The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- André Wünscher (6 members)
- Animation (1 member)
- Anja Lutz (1 member)
- Anselm Bauer (1 member)
- Apple (5 members)
- AppleScript (3 members)
- Arduino (25 members)
- Art (1 member)
- Audio (3 members)
- Augmented Spaces (1 member)
- Augmented reality (2 members)
- Automata (1 member)
- Automation (3 members)
- BCI (1 member)
- Barcode (1 member)
- Bauhaus (8 members)
- Bauhaus-Vorkurs (27 members)
- Ben Sassen (8 members)
- Berlin (1 member)
- Bernhard Bittorf (1 member)