• Categories by parameter‎ (25 C)

C

• Wikipedia categories that should not contain articles‎ (8 C)
• Container categories‎ (46,338 C)

D

• Disambiguation categories‎ (2,442 C)

E

• Eponymous categories‎ (14 C)

H

• Hidden categories‎ (35,691 C)

M

• Maintenance categories‎ (14 C)

N

• Namespace-specific categories‎ (8 C)
• Wikipedia non-diffusing subcategories‎ (18,200 C)
• Wikipedia non-diffusing parent categories‎ (744 C, 2 P)

R

• All redirect categories‎ (3,925 C)

S

• Set categories‎ (36,324 C)
• Wikipedia soft redirected categories‎ (111,605 C, −1 P)
• Wikipedia categories sorted by month‎ (1 C)

T

• Tracking categories‎ (24,307 C)