The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- RaspberryPi (2 members)
- Raum (9 members)
- Rechnender Raum (1 member)
- Research (3 members)
- Rickie Lea Owens (1 member)
- Robin Minard (2 members)
- Robots (1 member)
- SCC (2 members)
- SS07 (2 members)
- SS08 (3 members)
- SS09 (15 members)
- SS10 (37 members)
- SS11 (19 members)
- SS12 (18 members)
- SS13 (14 members)
- SS14 (8 members)
- SS15 (8 members)
- SS16 (18 members)
- SS17 (11 members)
- SS18 (10 members)