The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2012 (1 member)
- Administration (55 members)
- Arch Teapot (1 member)
- Camp (5 members)
- Chaos Communication Congress (1 member)
- Clubraum (6 members)
- Computer Networks (2 members)
- Computer Science (3 members)
- Conference (25 members)
- CryptoParty (3 members)
- EmbeddedHost (2 members)
- Enrollment (1 member)
- Events (1,057 members)
- Food (2 members)
- Freifunk (6 members)
- Freitagsfoo (651 members)
- Friday (2 members)
- Gaming (1 member)
- Geburtstag (2 members)
- Hack the Black Box (1 member)
- Hackathon (25 members)
- Hardware (1 member)
- Help (1 member)
- History (11 members)
- Host (40 members)
- Howto (3 members)
- Imported vocabulary (8 members)
- Kitchen (1 member)
- Lecture (9 members)
- Maintenance (7 members)
- Meet-Up (853 members)