Boards Everything about board and platform definitions and what else can be found in boards. Networking Everything about sock, gcoap, GNRC, other network stacks and whatever can be found in sys/net. archive The imported archive of the devel@ mailing list before the mailing list migration. Feel free to reply to these old posts, the moderators will migrate them then to the appropriate non-archive category. CPU Everything about MCUs, CPUs, vendor files and everything else in cpu. Continuous Integration Everything about Murdock, Philip and other RIOT continuous integration infrastructure. Packages Everything about external software libraries, the packaging system and what else can be found in pkg. Drivers Everything about device drivers, periph and everything else in drivers. Documentation All about READMEs, RDMs, the Doxygen documentation, and other stuff related to documentation.