The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Alternate world (1 member)
- America (1 member)
- And what do you do Mr Gable? (1 member)
- Apple (1 member)
- Applications (1 member)
- Archaeology (1 member)
- ArchiveTeam (2 members)
- Archives (1 member)
- ArchivesWiki (1 member)
- Archiving (19 members)
- Art (2 members)
- Art school (2 members)
- Articles (4 members)
- Artifactory (1 member)
- Arts and Crafts (movement) (3 members)
- Assessment (1 member)
- AtoM (2 members)
- Attention to process (1 member)
- AuDA (2 members)
- Audio (2 members)
- Auditing (1 member)
- August 2016 (0 members)
- Australian Computer Society (2 members)
- Authors (1 member)
- Awards (1 member)
- BBC (2 members)
- Backing up (2 members)
- Backpacks (1 member)
- Backups (6 members)
- Bags (2 members)
- Bannister Street (1 member)
- Barbecues (1 member)
- Batch files (1 member)
- Bc base convert (1 member)
- Beaconsfield (2 members)
- Beards (1 member)
- Beer (4 members)
- Behind the Lines (1 member)
- Ben Kafka (1 member)
- Ben Lee (1 member)
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- Bibliography (1 member)
- Bicycle (8 members)
- Bikes (1 member)
- Binding (1 member)
- Blathering (1 member)
- Blog action day (1 member)
- Blog posts (0 members)
- Blogging (17 members)
- Blogs (2 members)