diff --git a/libraries/EEPROM/library.properties b/libraries/EEPROM/library.properties
index 21437ff..f5cff58 100644
--- a/libraries/EEPROM/library.properties
+++ b/libraries/EEPROM/library.properties
@@ -4,6 +4,7 @@ author=Arduino, Christopher Andrews
 maintainer=Arduino <info@arduino.cc>
 sentence=Enables reading and writing to the permanent board storage. For all Arduino boards BUT Arduino DUE.
 paragraph=
+category=Devices
 url=http://www.arduino.cc/en/Reference/EEPROM
 architectures=avr
 
diff --git a/libraries/HID/library.properties b/libraries/HID/library.properties
index 20a1e7f..5cbb5d7 100644
--- a/libraries/HID/library.properties
+++ b/libraries/HID/library.properties
@@ -4,5 +4,6 @@ author=Arduino
 maintainer=Arduino <info@arduino.cc>
 sentence=Module for PluggableUSB infrastructure. Exposes an API for devices like Keyboards, Mice and Gamepads
 paragraph=
+category=Communication
 url=http://www.arduino.cc/en/Reference/HID
-architectures=avr
\ No newline at end of file
+architectures=avr
diff --git a/libraries/SPI/library.properties b/libraries/SPI/library.properties
index 2964aec..4428505 100644
--- a/libraries/SPI/library.properties
+++ b/libraries/SPI/library.properties
@@ -4,6 +4,7 @@ author=Arduino
 maintainer=Arduino <info@arduino.cc>
 sentence=Enables the communication with devices that use the Serial Peripheral Interface (SPI) Bus. For all Arduino boards, BUT Arduino DUE. 
 paragraph=
+category=Communication
 url=http://www.arduino.cc/en/Reference/SPI
 architectures=avr
 
diff --git a/libraries/SoftwareSerial/library.properties b/libraries/SoftwareSerial/library.properties
index 37eb04b..c42cbde 100644
--- a/libraries/SoftwareSerial/library.properties
+++ b/libraries/SoftwareSerial/library.properties
@@ -4,6 +4,7 @@ author=Arduino
 maintainer=Arduino <info@arduino.cc>
 sentence=Enables serial communication on digital pins. For all Arduino boards, BUT Arduino DUE.
 paragraph=
+category=Communication
 url=http://www.arduino.cc/en/Reference/SoftwareSerial
 architectures=avr
 
diff --git a/libraries/Wire/library.properties b/libraries/Wire/library.properties
index 0805847..811527b 100644
--- a/libraries/Wire/library.properties
+++ b/libraries/Wire/library.properties
@@ -4,6 +4,7 @@ author=Arduino
 maintainer=Arduino <info@arduino.cc>
 sentence=Allows the communication between devices or sensors connected via Two Wire Interface Bus. For all Arduino boards, BUT Arduino DUE. 
 paragraph=
+category=Communication
 url=http://www.arduino.cc/en/Reference/Wire
 architectures=avr