The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Amiga (5 members)
- Apple products (7 members)
- Article management templates (3 members)
- Article stubs (154 members)
- Atari products (3 members)
- BlogListingPage (0 members)
- Browse (4 members)
- Bushy Tree Diagram (2 members)
- Candidates for deletion (0 members)
- Category templates (3 members)
- Community (4 members)
- Computer systems (29 members)
- Content (1 member)
- Copyright (1 member)
- Digital Research products (3 members)
- Disambiguations (5 members)
- Forums (6 members)
- GUI Developers (4 members)
- General templates (10 members)
- General wiki templates (24 members)
- Help (6 members)
- Help desk (2 members)
- Hidden categories (2 members)
- IBM (2 members)
- Image wiki templates (9 members)
- Images (2 members)
- Legacy (10 members)
- Microsoft products (7 members)
- Operating systems (10 members)
- Organisation (8 members)
- Pages with broken file links (0 members)
- Policy (3 members)
- Sectional templates (3 members)
- Site administration (3 members)
- Site maintenance (3 members)
- Software (1 member)
- Succession templates (10 members)
- Sun Microsystems (4 members)
- Templates (10 members)
- Watercooler (2 members)
- Xerox products (11 members)