The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Cultural-Heritage (2 members)
- DIY Electronics (1 member)
- Daniel Belton (1 member)
- Darsha Hewitt (9 members)
- Dataflow (2 members)
- David Hahlbrock (1 member)
- Design (63 members)
- Dessau (1 member)
- Dokumentation (20 members)
- Dominique Hurth (4 members)
- Download (1 member)
- Dérive (4 members)
- Earth (1 member)
- Ecology (1 member)
- Electronics (37 members)
- Element (55 members)
- Elictricity (1 member)
- Embedded (1 member)
- Embroidery (1 member)
- Equipment (1 member)
- Erek Kühn (1 member)
- Ethiopia (2 members)
- Event (3 members)
- Excursion (18 members)
- Exhibition (1 member)
- Exhibition design (1 member)
- Experimental Movie (1 member)
- Experimental Television (1 member)
- Experimental motion design (1 member)
- Experimental television (3 members)
- Experimentelle Television (3 members)
- Experimentelles Radio (1 member)
- Experimentelles motion design (1 member)
- Expermintelle Televison (1 member)
- Fabbing (1 member)
- Fabian Giessler (6 members)
- Fachmodul (192 members)
- Felix Sattler (19 members)
- Film (1 member)
- Filters (1 member)
- Fingies (1 member)
- Fingies,Printed Electronics,Xiangzhen LU (1 member)
- Fire (1 member)
- Florian Wittig (7 members)
- Fotografie (1 member)
- Frank Barknecht (1 member)
- Frederic Gmeiner (6 members)
- Fulldome (16 members)
- GMU Equipment (12 members)
- GPS (10 members)