The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- (Neder)brackets (1 member)
- *Fix me! (2 members)
- 0-9 (1 member)
- ??? (11 members)
- A (2 members)
- ABBYY Lingvo (1 member)
- ADP (1 member)
- AGROVOC (2 members)
- AIRGLOSS (1 member)