The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 0000 sets (1,622 members)
- 08000 sets (2 members)
- 1000000 sets (6 members)
- 100000 sets (34 members)
- 10000 sets (911 members)
- 1000E sets (1 member)
- 1000T sets (1 member)
- 1000 sets (1,185 members)
- 110000 sets (3 members)
- 11000 sets (52 members)
- 12000 sets (9 members)
- 12V (72 members)
- 15000 sets (0 members)
- 16000 sets (0 members)
- 18+ sets (8 members)
- 18000 sets (1 member)
- 1891 (1 member)
- 1895 (2 members)
- 1904 (2 members)
- 1916 (2 members)
- 1920 (1 member)
- 1924 (1 member)
- 1932 (4 members)
- 1932 sets (1 member)
- 1934 (1 member)
- 1935 (2 members)
- 1935 sets (2 members)
- 1936 (2 members)
- 1937 (2 members)
- 1937 sets (1 member)
- 1939 (0 members)
- 1940 (2 members)
- 1940 sets (2 members)
- 1942 (1 member)
- 1943 (0 members)
- 1944 (0 members)
- 1945 (0 members)
- 1945 Sets (1 member)
- 1946 (2 members)
- 1946 sets (1 member)
- 1947 (2 members)
- 1947 sets (2 members)
- 1948 (2 members)
- 1948 sets (1 member)
- 1949 (3 members)
- 1949 sets (7 members)
- 1949 themes (1 member)
- 1950 (2 members)
- 1950 sets (10 members)
- 1951 (1 member)