The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Bash (1 member)
- Docker (8 members)
- E-Mail (1 member)
- FreeCrypto (11 members)
- Kubernetes (4 members)
- MySql (2 members)
- RTL-SDR (4 members)
- Raspberry (3 members)
- SSL (6 members)
- Servers (6 members)
- SysAdmin (4 members)
- SystemAdministration (1 member)