The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 1980 (1 member)
- 1981 (2 members)
- 1982 (2 members)
- 1983 (3 members)
- 1984 (4 members)
- 1985 (8 members)
- 1986 (14 members)
- 1987 (16 members)
- 1988 (18 members)
- 1989 (30 members)
- 1990 (29 members)
- 1991 (21 members)
- 1992 (16 members)
- 1993 (7 members)
- 1994 (14 members)
- 1995 (10 members)
- 1996 (11 members)
- 1997 (2 members)
- 1998 (7 members)
- 1999 (5 members)
- 2000 (4 members)
- 2001 (1 member)
- 2005 (1 member)
- ABI Electronics (4 members)
- AMT (1 member)
- Allumer (1 member)
- Amstar (1 member)
- Amstrad (1 member)
- Apple (69 members)
- Arcade (1,041 members)
- Arcadia (3 members)
- Atari (29 members)
- Atari Hardware ID (1 member)
- Atari PLD's (102 members)
- Athena (3 members)
- Atlus (1 member)
- Bad Dump (0 members)
- Banpresto (12 members)
- Bootleg (128 members)
- CAPCOM (81 members)
- CAPCOM B Boards (12 members)
- CAPCOM CPS1 (42 members)
- CAPCOM CPS1.5 (1 member)
- CAPCOM CPS2 (12 members)
- CAPCOM CPS Changer (1 member)
- CAPCOM C Boards (1 member)
- CAPCOM PLD's (119 members)
- Cave (10 members)
- Codemasters (5 members)
- Comad (3 members)