diff --git a/drivers/AnalogIn.cpp b/drivers/AnalogIn.cpp
index 86fd7be235..dd9d22f306 100644
--- a/drivers/AnalogIn.cpp
+++ b/drivers/AnalogIn.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/AnalogIn.h b/drivers/AnalogIn.h
index 287e6a3d7e..711109823e 100644
--- a/drivers/AnalogIn.h
+++ b/drivers/AnalogIn.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/AnalogOut.h b/drivers/AnalogOut.h
index 111e1006bf..285567f064 100644
--- a/drivers/AnalogOut.h
+++ b/drivers/AnalogOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/BusIn.cpp b/drivers/BusIn.cpp
index c14351f3fe..7aa557738c 100644
--- a/drivers/BusIn.cpp
+++ b/drivers/BusIn.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/BusIn.h b/drivers/BusIn.h
index da3f44545f..61bf7b536e 100644
--- a/drivers/BusIn.h
+++ b/drivers/BusIn.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/BusInOut.cpp b/drivers/BusInOut.cpp
index 170e035b96..8039a45040 100644
--- a/drivers/BusInOut.cpp
+++ b/drivers/BusInOut.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/BusInOut.h b/drivers/BusInOut.h
index 02f62fbf3f..64a4e0e189 100644
--- a/drivers/BusInOut.h
+++ b/drivers/BusInOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/BusOut.cpp b/drivers/BusOut.cpp
index 769d2e6891..654040103c 100644
--- a/drivers/BusOut.cpp
+++ b/drivers/BusOut.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/BusOut.h b/drivers/BusOut.h
index 46e21240a7..ca83d00a17 100644
--- a/drivers/BusOut.h
+++ b/drivers/BusOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/CAN.cpp b/drivers/CAN.cpp
index e3a0d42854..a3699e3919 100644
--- a/drivers/CAN.cpp
+++ b/drivers/CAN.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/CAN.h b/drivers/CAN.h
index d3565ee727..228eb611f0 100644
--- a/drivers/CAN.h
+++ b/drivers/CAN.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/DigitalIn.h b/drivers/DigitalIn.h
index 8eceb07707..348a87bf33 100644
--- a/drivers/DigitalIn.h
+++ b/drivers/DigitalIn.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/DigitalInOut.h b/drivers/DigitalInOut.h
index 88411957df..9ceb025aee 100644
--- a/drivers/DigitalInOut.h
+++ b/drivers/DigitalInOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/DigitalOut.h b/drivers/DigitalOut.h
index 8f9059173e..b9fe1f2d3e 100644
--- a/drivers/DigitalOut.h
+++ b/drivers/DigitalOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Ethernet.cpp b/drivers/Ethernet.cpp
index 6b0a2bfab6..b2b73c113c 100644
--- a/drivers/Ethernet.cpp
+++ b/drivers/Ethernet.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Ethernet.h b/drivers/Ethernet.h
index a9b7c2c1db..675851dacd 100644
--- a/drivers/Ethernet.h
+++ b/drivers/Ethernet.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/I2C.cpp b/drivers/I2C.cpp
index 2cdcc49d8c..3e06825c17 100644
--- a/drivers/I2C.cpp
+++ b/drivers/I2C.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/I2C.h b/drivers/I2C.h
index daca532ef5..d1857b6557 100644
--- a/drivers/I2C.h
+++ b/drivers/I2C.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/I2CSlave.cpp b/drivers/I2CSlave.cpp
index b29b4e74e2..f0697460be 100644
--- a/drivers/I2CSlave.cpp
+++ b/drivers/I2CSlave.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/I2CSlave.h b/drivers/I2CSlave.h
index 12d9ce08c7..c07cef138a 100644
--- a/drivers/I2CSlave.h
+++ b/drivers/I2CSlave.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/InterruptIn.cpp b/drivers/InterruptIn.cpp
index 51d947f7a3..a4ab5f0135 100644
--- a/drivers/InterruptIn.cpp
+++ b/drivers/InterruptIn.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/InterruptIn.h b/drivers/InterruptIn.h
index 85928e3e85..39f68ce1c0 100644
--- a/drivers/InterruptIn.h
+++ b/drivers/InterruptIn.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/InterruptManager.cpp b/drivers/InterruptManager.cpp
index f557cf4378..179731b419 100644
--- a/drivers/InterruptManager.cpp
+++ b/drivers/InterruptManager.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/InterruptManager.h b/drivers/InterruptManager.h
index 6b3c1d086c..8b207f0c5e 100644
--- a/drivers/InterruptManager.h
+++ b/drivers/InterruptManager.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/LowPowerTicker.h b/drivers/LowPowerTicker.h
index a77307e68b..a6f9fa9401 100644
--- a/drivers/LowPowerTicker.h
+++ b/drivers/LowPowerTicker.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/LowPowerTimeout.h b/drivers/LowPowerTimeout.h
index 561c4a2201..0b68e8ea75 100644
--- a/drivers/LowPowerTimeout.h
+++ b/drivers/LowPowerTimeout.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/LowPowerTimer.h b/drivers/LowPowerTimer.h
index 19bb8fdc3e..0b0c1ebaf8 100644
--- a/drivers/LowPowerTimer.h
+++ b/drivers/LowPowerTimer.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/MbedCRC.cpp b/drivers/MbedCRC.cpp
index 34e777a251..6353e052c3 100644
--- a/drivers/MbedCRC.cpp
+++ b/drivers/MbedCRC.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/MbedCRC.h b/drivers/MbedCRC.h
index 9c7328bd00..f5ee20a9ec 100644
--- a/drivers/MbedCRC.h
+++ b/drivers/MbedCRC.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/PortIn.h b/drivers/PortIn.h
index fbecc257e0..8545f88efa 100644
--- a/drivers/PortIn.h
+++ b/drivers/PortIn.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/PortInOut.h b/drivers/PortInOut.h
index 00c972c2a0..24eede48c7 100644
--- a/drivers/PortInOut.h
+++ b/drivers/PortInOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/PortOut.h b/drivers/PortOut.h
index 8df644e56c..814900cab4 100644
--- a/drivers/PortOut.h
+++ b/drivers/PortOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/PwmOut.h b/drivers/PwmOut.h
index 6d6f847f8f..087a1a7f64 100644
--- a/drivers/PwmOut.h
+++ b/drivers/PwmOut.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/QSPI.cpp b/drivers/QSPI.cpp
index 9a75d79727..c79c949e3b 100644
--- a/drivers/QSPI.cpp
+++ b/drivers/QSPI.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/QSPI.h b/drivers/QSPI.h
index 764a1167ff..afddf60b80 100644
--- a/drivers/QSPI.h
+++ b/drivers/QSPI.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/RawSerial.cpp b/drivers/RawSerial.cpp
index 2943bd9520..b473fddae4 100644
--- a/drivers/RawSerial.cpp
+++ b/drivers/RawSerial.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/RawSerial.h b/drivers/RawSerial.h
index bb06fe4787..909e3eaea7 100644
--- a/drivers/RawSerial.h
+++ b/drivers/RawSerial.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/SPI.cpp b/drivers/SPI.cpp
index d679a9c0a8..8ae1ee2f4e 100644
--- a/drivers/SPI.cpp
+++ b/drivers/SPI.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/SPI.h b/drivers/SPI.h
index 10efc7d0aa..9ba1360bfc 100644
--- a/drivers/SPI.h
+++ b/drivers/SPI.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/SPISlave.cpp b/drivers/SPISlave.cpp
index 1f826bb343..db870cdea2 100644
--- a/drivers/SPISlave.cpp
+++ b/drivers/SPISlave.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/SPISlave.h b/drivers/SPISlave.h
index 6ee9ba6171..8d98d36ce2 100644
--- a/drivers/SPISlave.h
+++ b/drivers/SPISlave.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Serial.cpp b/drivers/Serial.cpp
index 55e5a38bba..d0f87263b6 100644
--- a/drivers/Serial.cpp
+++ b/drivers/Serial.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Serial.h b/drivers/Serial.h
index 1b1e6aa34e..54bdf9cbd3 100644
--- a/drivers/Serial.h
+++ b/drivers/Serial.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/SerialBase.cpp b/drivers/SerialBase.cpp
index c4333d9f97..6557a93e65 100644
--- a/drivers/SerialBase.cpp
+++ b/drivers/SerialBase.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/SerialBase.h b/drivers/SerialBase.h
index a78d7d0088..c945202b4c 100644
--- a/drivers/SerialBase.h
+++ b/drivers/SerialBase.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/SerialWireOutput.h b/drivers/SerialWireOutput.h
index 1e90ebc17c..0379687c9b 100644
--- a/drivers/SerialWireOutput.h
+++ b/drivers/SerialWireOutput.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/TableCRC.cpp b/drivers/TableCRC.cpp
index b6e55aaae8..b0d316e471 100644
--- a/drivers/TableCRC.cpp
+++ b/drivers/TableCRC.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/TableCRC.h b/drivers/TableCRC.h
index 478bb25958..1ab5bf8365 100644
--- a/drivers/TableCRC.h
+++ b/drivers/TableCRC.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Ticker.cpp b/drivers/Ticker.cpp
index efa3efb9c0..feb27ef57b 100644
--- a/drivers/Ticker.cpp
+++ b/drivers/Ticker.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Ticker.h b/drivers/Ticker.h
index 059d6a1792..31ce72cfad 100644
--- a/drivers/Ticker.h
+++ b/drivers/Ticker.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Timeout.cpp b/drivers/Timeout.cpp
index 159cc0d4b4..42141c4c48 100644
--- a/drivers/Timeout.cpp
+++ b/drivers/Timeout.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Timeout.h b/drivers/Timeout.h
index f39dcc03d1..c155c9bcec 100644
--- a/drivers/Timeout.h
+++ b/drivers/Timeout.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Timer.cpp b/drivers/Timer.cpp
index 5a6d7df9e4..b13f86ce90 100644
--- a/drivers/Timer.cpp
+++ b/drivers/Timer.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/Timer.h b/drivers/Timer.h
index 9cc3586d98..010f6019b5 100644
--- a/drivers/Timer.h
+++ b/drivers/Timer.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/TimerEvent.cpp b/drivers/TimerEvent.cpp
index 9c5174dc72..9c77eb86f5 100644
--- a/drivers/TimerEvent.cpp
+++ b/drivers/TimerEvent.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/TimerEvent.h b/drivers/TimerEvent.h
index 87e2481cf2..88f4c3b750 100644
--- a/drivers/TimerEvent.h
+++ b/drivers/TimerEvent.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/UARTSerial.cpp b/drivers/UARTSerial.cpp
index 845f0a19e8..2f317b5310 100644
--- a/drivers/UARTSerial.cpp
+++ b/drivers/UARTSerial.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/drivers/UARTSerial.h b/drivers/UARTSerial.h
index 792d3e0f36..2a47da1a38 100644
--- a/drivers/UARTSerial.h
+++ b/drivers/UARTSerial.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/events/Event.h b/events/Event.h
index dd0d8e6cf3..a8a2ff6234 100644
--- a/events/Event.h
+++ b/events/Event.h
@@ -1,5 +1,6 @@
 /* events
  * Copyright (c) 2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/events/EventQueue.cpp b/events/EventQueue.cpp
index f04917c4ef..3cd89a6b23 100644
--- a/events/EventQueue.cpp
+++ b/events/EventQueue.cpp
@@ -1,5 +1,6 @@
 /* events
  * Copyright (c) 2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/events/EventQueue.h b/events/EventQueue.h
index 02d3d31da1..c5d7ef1f55 100644
--- a/events/EventQueue.h
+++ b/events/EventQueue.h
@@ -1,5 +1,6 @@
 /* events
  * Copyright (c) 2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/events/mbed_events.h b/events/mbed_events.h
index 341bf16087..466b82bb17 100644
--- a/events/mbed_events.h
+++ b/events/mbed_events.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* events
  * Copyright (c) 2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/LowPowerTickerWrapper.cpp b/hal/LowPowerTickerWrapper.cpp
index 179895f7ff..1463d21178 100644
--- a/hal/LowPowerTickerWrapper.cpp
+++ b/hal/LowPowerTickerWrapper.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/LowPowerTickerWrapper.h b/hal/LowPowerTickerWrapper.h
index 8a6a05aca0..5ce81c59e3 100644
--- a/hal/LowPowerTickerWrapper.h
+++ b/hal/LowPowerTickerWrapper.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/TARGET_FLASH_CMSIS_ALGO/flash_common_algo.c b/hal/TARGET_FLASH_CMSIS_ALGO/flash_common_algo.c
index b91191d9eb..6eff41aa72 100644
--- a/hal/TARGET_FLASH_CMSIS_ALGO/flash_common_algo.c
+++ b/hal/TARGET_FLASH_CMSIS_ALGO/flash_common_algo.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/TARGET_FLASH_CMSIS_ALGO/flash_data.h b/hal/TARGET_FLASH_CMSIS_ALGO/flash_data.h
index fe6732a673..91c87b1ab1 100644
--- a/hal/TARGET_FLASH_CMSIS_ALGO/flash_data.h
+++ b/hal/TARGET_FLASH_CMSIS_ALGO/flash_data.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/analogin_api.h b/hal/analogin_api.h
index 674e1af24e..4152440293 100644
--- a/hal/analogin_api.h
+++ b/hal/analogin_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/analogout_api.h b/hal/analogout_api.h
index 6875b77617..7c25369a12 100644
--- a/hal/analogout_api.h
+++ b/hal/analogout_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/buffer.h b/hal/buffer.h
index bf01cd6009..a68b940801 100644
--- a/hal/buffer.h
+++ b/hal/buffer.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2014-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/can_api.h b/hal/can_api.h
index 7fb6390511..777dc6b443 100644
--- a/hal/can_api.h
+++ b/hal/can_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/can_helper.h b/hal/can_helper.h
index bf04f4c47a..5a117509fd 100644
--- a/hal/can_helper.h
+++ b/hal/can_helper.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/crc_api.h b/hal/crc_api.h
index 29336feb9b..161f27b7eb 100644
--- a/hal/crc_api.h
+++ b/hal/crc_api.h
@@ -2,6 +2,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/critical_section_api.h b/hal/critical_section_api.h
index d5cb24296f..8c6ac5971f 100644
--- a/hal/critical_section_api.h
+++ b/hal/critical_section_api.h
@@ -2,6 +2,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/dma_api.h b/hal/dma_api.h
index 1c9755d975..864439e3f0 100644
--- a/hal/dma_api.h
+++ b/hal/dma_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2014-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/ethernet_api.h b/hal/ethernet_api.h
index 1802db955e..1a14fda06e 100644
--- a/hal/ethernet_api.h
+++ b/hal/ethernet_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/flash_api.h b/hal/flash_api.h
index 4b59193e45..e98c806a0a 100644
--- a/hal/flash_api.h
+++ b/hal/flash_api.h
@@ -3,6 +3,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/gpio_api.h b/hal/gpio_api.h
index 9f11937be4..51156acd23 100644
--- a/hal/gpio_api.h
+++ b/hal/gpio_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/gpio_irq_api.h b/hal/gpio_irq_api.h
index eb631716df..6ca858f600 100644
--- a/hal/gpio_irq_api.h
+++ b/hal/gpio_irq_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/i2c_api.h b/hal/i2c_api.h
index 18f902369e..43ed7bcebd 100644
--- a/hal/i2c_api.h
+++ b/hal/i2c_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/itm_api.h b/hal/itm_api.h
index 38607789ce..8da26212f5 100644
--- a/hal/itm_api.h
+++ b/hal/itm_api.h
@@ -2,6 +2,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/lp_ticker_api.h b/hal/lp_ticker_api.h
index 374990803c..aecaf8ac4a 100644
--- a/hal/lp_ticker_api.h
+++ b/hal/lp_ticker_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_critical_section_api.c b/hal/mbed_critical_section_api.c
index 21e3338b64..05b42b6f8f 100644
--- a/hal/mbed_critical_section_api.c
+++ b/hal/mbed_critical_section_api.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_flash_api.c b/hal/mbed_flash_api.c
index 83fa7f1805..a5d009bc87 100644
--- a/hal/mbed_flash_api.c
+++ b/hal/mbed_flash_api.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_gpio.c b/hal/mbed_gpio.c
index 7bf52dd76d..b58a6ca61a 100644
--- a/hal/mbed_gpio.c
+++ b/hal/mbed_gpio.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_itm_api.c b/hal/mbed_itm_api.c
index 17afe5e156..0744bb19c8 100644
--- a/hal/mbed_itm_api.c
+++ b/hal/mbed_itm_api.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_lp_ticker_api.c b/hal/mbed_lp_ticker_api.c
index 477c1b1387..7a29964fd2 100644
--- a/hal/mbed_lp_ticker_api.c
+++ b/hal/mbed_lp_ticker_api.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_lp_ticker_wrapper.cpp b/hal/mbed_lp_ticker_wrapper.cpp
index 403141fcea..09c1a9bf3c 100644
--- a/hal/mbed_lp_ticker_wrapper.cpp
+++ b/hal/mbed_lp_ticker_wrapper.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_lp_ticker_wrapper.h b/hal/mbed_lp_ticker_wrapper.h
index e1c1fe4a26..3493abe496 100644
--- a/hal/mbed_lp_ticker_wrapper.h
+++ b/hal/mbed_lp_ticker_wrapper.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_pinmap_common.c b/hal/mbed_pinmap_common.c
index 1805607502..0f2083d92e 100644
--- a/hal/mbed_pinmap_common.c
+++ b/hal/mbed_pinmap_common.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_sleep_manager.c b/hal/mbed_sleep_manager.c
index 03f678e826..987e91bf2e 100644
--- a/hal/mbed_sleep_manager.c
+++ b/hal/mbed_sleep_manager.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_ticker_api.c b/hal/mbed_ticker_api.c
index 5c9fc55bce..36ea2938fd 100644
--- a/hal/mbed_ticker_api.c
+++ b/hal/mbed_ticker_api.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/mbed_us_ticker_api.c b/hal/mbed_us_ticker_api.c
index 433a035540..28626e0bd6 100644
--- a/hal/mbed_us_ticker_api.c
+++ b/hal/mbed_us_ticker_api.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/pinmap.h b/hal/pinmap.h
index 4b3db4afa4..d94892a7c6 100644
--- a/hal/pinmap.h
+++ b/hal/pinmap.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/port_api.h b/hal/port_api.h
index 6e718c54a0..48bd0d27f1 100644
--- a/hal/port_api.h
+++ b/hal/port_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/pwmout_api.h b/hal/pwmout_api.h
index 00588c0092..5ede26df1c 100644
--- a/hal/pwmout_api.h
+++ b/hal/pwmout_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/qspi_api.h b/hal/qspi_api.h
index 24ba473545..561e0afb5c 100644
--- a/hal/qspi_api.h
+++ b/hal/qspi_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/rtc_api.h b/hal/rtc_api.h
index b049087968..5685f88158 100644
--- a/hal/rtc_api.h
+++ b/hal/rtc_api.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/serial_api.h b/hal/serial_api.h
index 30f100f8c7..1da952a6c7 100644
--- a/hal/serial_api.h
+++ b/hal/serial_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/sleep_api.h b/hal/sleep_api.h
index bc484d6f1b..1dd2d0dfcd 100644
--- a/hal/sleep_api.h
+++ b/hal/sleep_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/spi_api.h b/hal/spi_api.h
index 90117c822b..423f113c78 100644
--- a/hal/spi_api.h
+++ b/hal/spi_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/ticker_api.h b/hal/ticker_api.h
index 98b2786ee3..f7615e4aae 100644
--- a/hal/ticker_api.h
+++ b/hal/ticker_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/trng_api.h b/hal/trng_api.h
index 946c25331c..7677094103 100644
--- a/hal/trng_api.h
+++ b/hal/trng_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/hal/us_ticker_api.h b/hal/us_ticker_api.h
index e27c8051f4..ca43e74dc7 100644
--- a/hal/us_ticker_api.h
+++ b/hal/us_ticker_api.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/ATCmdParser.cpp b/platform/ATCmdParser.cpp
index 0108e8bb18..7ff2ae00ac 100644
--- a/platform/ATCmdParser.cpp
+++ b/platform/ATCmdParser.cpp
@@ -1,4 +1,5 @@
 /* Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/ATCmdParser.h b/platform/ATCmdParser.h
index 0ff4fbd1c5..927b24d992 100644
--- a/platform/ATCmdParser.h
+++ b/platform/ATCmdParser.h
@@ -1,4 +1,5 @@
 /* Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/CThunk.h b/platform/CThunk.h
index 0610d5a111..5bd6998ea6 100644
--- a/platform/CThunk.h
+++ b/platform/CThunk.h
@@ -13,6 +13,7 @@
  * - ideally suited for class object receiving interrupts (NVIC_SetVector)
  *
  * Copyright (c) 2014-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/CThunkBase.cpp b/platform/CThunkBase.cpp
index 39ebea47b6..ce9271bc53 100644
--- a/platform/CThunkBase.cpp
+++ b/platform/CThunkBase.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/CThunkBase.h b/platform/CThunkBase.h
index ec54a22d4f..c2ae68c28c 100644
--- a/platform/CThunkBase.h
+++ b/platform/CThunkBase.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/CallChain.cpp b/platform/CallChain.cpp
index 6a72d932a4..db8be12f7e 100644
--- a/platform/CallChain.cpp
+++ b/platform/CallChain.cpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 // Suppress deprecation warnings since this whole
 // class is deprecated already
diff --git a/platform/CallChain.h b/platform/CallChain.h
index 3fe17231b0..0f35dc1b5e 100644
--- a/platform/CallChain.h
+++ b/platform/CallChain.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/Callback.h b/platform/Callback.h
index 1a6b6751bc..52f6732c71 100644
--- a/platform/Callback.h
+++ b/platform/Callback.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/CircularBuffer.h b/platform/CircularBuffer.h
index 2eb5fd5a04..d1b15e7d5e 100644
--- a/platform/CircularBuffer.h
+++ b/platform/CircularBuffer.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/CriticalSectionLock.h b/platform/CriticalSectionLock.h
index f654f5d26c..cf861f93a2 100644
--- a/platform/CriticalSectionLock.h
+++ b/platform/CriticalSectionLock.h
@@ -1,6 +1,6 @@
 /*
- * PackageLicenseDeclared: Apache-2.0
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/DeepSleepLock.h b/platform/DeepSleepLock.h
index b383770b9a..37aa98376e 100644
--- a/platform/DeepSleepLock.h
+++ b/platform/DeepSleepLock.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/DirHandle.h b/platform/DirHandle.h
index 47e4b9a449..859d833428 100644
--- a/platform/DirHandle.h
+++ b/platform/DirHandle.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileBase.cpp b/platform/FileBase.cpp
index 5ee1a98c0d..7a6f0a32b7 100644
--- a/platform/FileBase.cpp
+++ b/platform/FileBase.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileBase.h b/platform/FileBase.h
index 25b650145b..68b74ed968 100644
--- a/platform/FileBase.h
+++ b/platform/FileBase.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileHandle.cpp b/platform/FileHandle.cpp
index c8cd9032a7..be8b9cef45 100644
--- a/platform/FileHandle.cpp
+++ b/platform/FileHandle.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileHandle.h b/platform/FileHandle.h
index c9aea35833..07010df495 100644
--- a/platform/FileHandle.h
+++ b/platform/FileHandle.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileLike.h b/platform/FileLike.h
index e75be50bfd..f4e1911f23 100644
--- a/platform/FileLike.h
+++ b/platform/FileLike.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FilePath.cpp b/platform/FilePath.cpp
index 92511d1b68..18cb871986 100644
--- a/platform/FilePath.cpp
+++ b/platform/FilePath.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FilePath.h b/platform/FilePath.h
index 6183ffbcef..19f1c1b94a 100644
--- a/platform/FilePath.h
+++ b/platform/FilePath.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileSystemHandle.cpp b/platform/FileSystemHandle.cpp
index 0ce6f1603e..24dc0b2acb 100644
--- a/platform/FileSystemHandle.cpp
+++ b/platform/FileSystemHandle.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileSystemHandle.h b/platform/FileSystemHandle.h
index bfdf667dc6..d5bd217fc0 100644
--- a/platform/FileSystemHandle.h
+++ b/platform/FileSystemHandle.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FileSystemLike.h b/platform/FileSystemLike.h
index abcd6358d3..ce6df43881 100644
--- a/platform/FileSystemLike.h
+++ b/platform/FileSystemLike.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/FunctionPointer.h b/platform/FunctionPointer.h
index c17f53a9a9..90a808015c 100644
--- a/platform/FunctionPointer.h
+++ b/platform/FunctionPointer.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/LocalFileSystem.cpp b/platform/LocalFileSystem.cpp
index c5c7d33dff..3a5a09cfa8 100644
--- a/platform/LocalFileSystem.cpp
+++ b/platform/LocalFileSystem.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/LocalFileSystem.h b/platform/LocalFileSystem.h
index 78ca499375..7314320d44 100644
--- a/platform/LocalFileSystem.h
+++ b/platform/LocalFileSystem.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/NonCopyable.h b/platform/NonCopyable.h
index 4322e4149a..70f76e7177 100644
--- a/platform/NonCopyable.h
+++ b/platform/NonCopyable.h
@@ -1,4 +1,5 @@
 /* Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/PlatformMutex.h b/platform/PlatformMutex.h
index ac06a81855..a63672dc0c 100644
--- a/platform/PlatformMutex.h
+++ b/platform/PlatformMutex.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/ScopedLock.h b/platform/ScopedLock.h
index 8e9018c178..d6d1854d9a 100644
--- a/platform/ScopedLock.h
+++ b/platform/ScopedLock.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/SharedPtr.h b/platform/SharedPtr.h
index d273507255..0663b2147d 100644
--- a/platform/SharedPtr.h
+++ b/platform/SharedPtr.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/SingletonPtr.h b/platform/SingletonPtr.h
index 81791ca93f..82b7bcf50a 100644
--- a/platform/SingletonPtr.h
+++ b/platform/SingletonPtr.h
@@ -7,6 +7,7 @@
  */
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/Span.h b/platform/Span.h
index 04ef2e1ab0..9859402aa2 100644
--- a/platform/Span.h
+++ b/platform/Span.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/Stream.cpp b/platform/Stream.cpp
index e395425ae7..5c45c6c79f 100644
--- a/platform/Stream.cpp
+++ b/platform/Stream.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/Stream.h b/platform/Stream.h
index bd705c4966..e8783038f4 100644
--- a/platform/Stream.h
+++ b/platform/Stream.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/Transaction.h b/platform/Transaction.h
index 1d8d6ff9de..6917c4d12b 100644
--- a/platform/Transaction.h
+++ b/platform/Transaction.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_alloc_wrappers.cpp b/platform/mbed_alloc_wrappers.cpp
index 44521573f7..1d06a4873f 100644
--- a/platform/mbed_alloc_wrappers.cpp
+++ b/platform/mbed_alloc_wrappers.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_application.c b/platform/mbed_application.c
index eab55bc1cd..b55519491b 100644
--- a/platform/mbed_application.c
+++ b/platform/mbed_application.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_application.h b/platform/mbed_application.h
index ba2aebaecb..1cccfb83bc 100644
--- a/platform/mbed_application.h
+++ b/platform/mbed_application.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_assert.c b/platform/mbed_assert.c
index bc1934461a..5ed490a110 100644
--- a/platform/mbed_assert.c
+++ b/platform/mbed_assert.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_assert.h b/platform/mbed_assert.h
index 4976c11b45..a748f3aceb 100644
--- a/platform/mbed_assert.h
+++ b/platform/mbed_assert.h
@@ -7,6 +7,7 @@
  */
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_board.c b/platform/mbed_board.c
index 59635d1d33..143772a67c 100644
--- a/platform/mbed_board.c
+++ b/platform/mbed_board.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_debug.h b/platform/mbed_debug.h
index 38da79a821..f560f3db33 100644
--- a/platform/mbed_debug.h
+++ b/platform/mbed_debug.h
@@ -8,6 +8,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_error.c b/platform/mbed_error.c
index 0faca8b7fc..49f4b8a7eb 100644
--- a/platform/mbed_error.c
+++ b/platform/mbed_error.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_error.h b/platform/mbed_error.h
index 56355e48e0..d91c967f6c 100644
--- a/platform/mbed_error.h
+++ b/platform/mbed_error.h
@@ -6,6 +6,7 @@
  */
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_error_hist.c b/platform/mbed_error_hist.c
index 411ae097ca..9a618e5dda 100644
--- a/platform/mbed_error_hist.c
+++ b/platform/mbed_error_hist.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_error_hist.h b/platform/mbed_error_hist.h
index e83315bfec..791b562b65 100644
--- a/platform/mbed_error_hist.h
+++ b/platform/mbed_error_hist.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_interface.c b/platform/mbed_interface.c
index b1a43697e9..ddacbb99ae 100644
--- a/platform/mbed_interface.c
+++ b/platform/mbed_interface.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_interface.h b/platform/mbed_interface.h
index 241cd7be8d..dd20080ed2 100644
--- a/platform/mbed_interface.h
+++ b/platform/mbed_interface.h
@@ -8,6 +8,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_mem_trace.cpp b/platform/mbed_mem_trace.cpp
index f34453cfd3..8ba4dd8095 100644
--- a/platform/mbed_mem_trace.cpp
+++ b/platform/mbed_mem_trace.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_mem_trace.h b/platform/mbed_mem_trace.h
index a1b2f10f87..28760b8607 100644
--- a/platform/mbed_mem_trace.h
+++ b/platform/mbed_mem_trace.h
@@ -4,6 +4,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_mktime.c b/platform/mbed_mktime.c
index 68e3b9f62d..7c282325a4 100644
--- a/platform/mbed_mktime.c
+++ b/platform/mbed_mktime.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_mktime.h b/platform/mbed_mktime.h
index eed21a9fc3..58b7624969 100644
--- a/platform/mbed_mktime.h
+++ b/platform/mbed_mktime.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2017-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_poll.cpp b/platform/mbed_poll.cpp
index da9e825d8a..a1e7627616 100644
--- a/platform/mbed_poll.cpp
+++ b/platform/mbed_poll.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_poll.h b/platform/mbed_poll.h
index f9c894c21f..43d7cce57c 100644
--- a/platform/mbed_poll.h
+++ b/platform/mbed_poll.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_power_mgmt.h b/platform/mbed_power_mgmt.h
index ba0d1bda39..3b8791f2b1 100644
--- a/platform/mbed_power_mgmt.h
+++ b/platform/mbed_power_mgmt.h
@@ -7,6 +7,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_preprocessor.h b/platform/mbed_preprocessor.h
index 7df3bb6812..42685cda1c 100644
--- a/platform/mbed_preprocessor.h
+++ b/platform/mbed_preprocessor.h
@@ -7,6 +7,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_retarget.cpp b/platform/mbed_retarget.cpp
index 7e8ed8725d..276701f70b 100644
--- a/platform/mbed_retarget.cpp
+++ b/platform/mbed_retarget.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2015 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_retarget.h b/platform/mbed_retarget.h
index d61f3c8c65..9eb27dca6a 100644
--- a/platform/mbed_retarget.h
+++ b/platform/mbed_retarget.h
@@ -1,6 +1,7 @@
 /*
  * mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_rtc_time.cpp b/platform/mbed_rtc_time.cpp
index 7ec6171b4d..37cb1cf526 100644
--- a/platform/mbed_rtc_time.cpp
+++ b/platform/mbed_rtc_time.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_rtc_time.h b/platform/mbed_rtc_time.h
index f1b04c3d68..1dc021c806 100644
--- a/platform/mbed_rtc_time.h
+++ b/platform/mbed_rtc_time.h
@@ -7,6 +7,7 @@
  */
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_sdk_boot.c b/platform/mbed_sdk_boot.c
index 32658ef60c..9f3aef1899 100644
--- a/platform/mbed_sdk_boot.c
+++ b/platform/mbed_sdk_boot.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_semihost_api.c b/platform/mbed_semihost_api.c
index f655862c3a..c9975519fc 100644
--- a/platform/mbed_semihost_api.c
+++ b/platform/mbed_semihost_api.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_semihost_api.h b/platform/mbed_semihost_api.h
index 2f20c8cbb2..dde34f8a53 100644
--- a/platform/mbed_semihost_api.h
+++ b/platform/mbed_semihost_api.h
@@ -1,6 +1,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_stats.h b/platform/mbed_stats.h
index bb6617334f..5ba31b3a0a 100644
--- a/platform/mbed_stats.h
+++ b/platform/mbed_stats.h
@@ -7,6 +7,7 @@
  */
 /* mbed Microcontroller Library
  * Copyright (c) 2016-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_toolchain.h b/platform/mbed_toolchain.h
index fba7d32bed..b36775c5f4 100644
--- a/platform/mbed_toolchain.h
+++ b/platform/mbed_toolchain.h
@@ -8,6 +8,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_version.h b/platform/mbed_version.h
index 650f5396a7..a178579369 100644
--- a/platform/mbed_version.h
+++ b/platform/mbed_version.h
@@ -7,6 +7,7 @@
  */
 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_wait_api.h b/platform/mbed_wait_api.h
index 92a380ed9d..9402d6050a 100644
--- a/platform/mbed_wait_api.h
+++ b/platform/mbed_wait_api.h
@@ -8,6 +8,7 @@
 
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_wait_api_no_rtos.c b/platform/mbed_wait_api_no_rtos.c
index c29ba17217..d03840e866 100644
--- a/platform/mbed_wait_api_no_rtos.c
+++ b/platform/mbed_wait_api_no_rtos.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/mbed_wait_api_rtos.cpp b/platform/mbed_wait_api_rtos.cpp
index f859093900..f3b987ae69 100644
--- a/platform/mbed_wait_api_rtos.cpp
+++ b/platform/mbed_wait_api_rtos.cpp
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -53,7 +54,7 @@ void wait_ms(int ms)
     if (core_util_is_isr_active() || !core_util_are_interrupts_enabled()) {
 #if defined(MBED_TRAP_ERRORS_ENABLED) && MBED_TRAP_ERRORS_ENABLED
         MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_INVALID_OPERATION),
-                    "Deprecated behavior: milli-sec delay should not be used in interrupt.\n");
+                   "Deprecated behavior: milli-sec delay should not be used in interrupt.\n");
 #else
         wait_us(ms * 1000);
 #endif
diff --git a/platform/platform.h b/platform/platform.h
index a5802ff655..33a48c9499 100644
--- a/platform/platform.h
+++ b/platform/platform.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/platform/toolchain.h b/platform/toolchain.h
index 6fbef808ca..cf561fca75 100644
--- a/platform/toolchain.h
+++ b/platform/toolchain.h
@@ -3,6 +3,7 @@
 /** @{*/
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_MICRO/mbed_boot_arm_micro.c b/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_MICRO/mbed_boot_arm_micro.c
index c968deb755..58080a168d 100644
--- a/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_MICRO/mbed_boot_arm_micro.c
+++ b/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_MICRO/mbed_boot_arm_micro.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_STD/mbed_boot_arm_std.c b/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_STD/mbed_boot_arm_std.c
index 1475082d8a..482870f501 100644
--- a/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_STD/mbed_boot_arm_std.c
+++ b/rtos/TARGET_CORTEX/TOOLCHAIN_ARM_STD/mbed_boot_arm_std.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/TOOLCHAIN_GCC_ARM/mbed_boot_gcc_arm.c b/rtos/TARGET_CORTEX/TOOLCHAIN_GCC_ARM/mbed_boot_gcc_arm.c
index 105f780860..1060f349f6 100644
--- a/rtos/TARGET_CORTEX/TOOLCHAIN_GCC_ARM/mbed_boot_gcc_arm.c
+++ b/rtos/TARGET_CORTEX/TOOLCHAIN_GCC_ARM/mbed_boot_gcc_arm.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/TOOLCHAIN_IAR/mbed_boot_iar.c b/rtos/TARGET_CORTEX/TOOLCHAIN_IAR/mbed_boot_iar.c
index 387b7f8dc1..0812be93f0 100644
--- a/rtos/TARGET_CORTEX/TOOLCHAIN_IAR/mbed_boot_iar.c
+++ b/rtos/TARGET_CORTEX/TOOLCHAIN_IAR/mbed_boot_iar.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/mbed_boot.c b/rtos/TARGET_CORTEX/mbed_boot.c
index ccca64aa72..3dd7cdb1ce 100644
--- a/rtos/TARGET_CORTEX/mbed_boot.c
+++ b/rtos/TARGET_CORTEX/mbed_boot.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/mbed_boot.h b/rtos/TARGET_CORTEX/mbed_boot.h
index 7aef50fe91..aed0cdd707 100644
--- a/rtos/TARGET_CORTEX/mbed_boot.h
+++ b/rtos/TARGET_CORTEX/mbed_boot.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/mbed_rtos1_types.h b/rtos/TARGET_CORTEX/mbed_rtos1_types.h
index 73df37f061..e44fa25edb 100644
--- a/rtos/TARGET_CORTEX/mbed_rtos1_types.h
+++ b/rtos/TARGET_CORTEX/mbed_rtos1_types.h
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2017 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/rtos/TARGET_CORTEX/mbed_rtos_rtx.c b/rtos/TARGET_CORTEX/mbed_rtos_rtx.c
index 6e7a11c2e8..6446ab34b1 100644
--- a/rtos/TARGET_CORTEX/mbed_rtos_rtx.c
+++ b/rtos/TARGET_CORTEX/mbed_rtos_rtx.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2018-2018 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/rtos/TARGET_CORTEX/mbed_rtx_handlers.c b/rtos/TARGET_CORTEX/mbed_rtx_handlers.c
index 8bc395cba3..845990c7c1 100644
--- a/rtos/TARGET_CORTEX/mbed_rtx_handlers.c
+++ b/rtos/TARGET_CORTEX/mbed_rtx_handlers.c
@@ -1,5 +1,6 @@
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2016 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.