The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Middendorf, J (23 members)
- Mikhailova, I (3 members)
- Miller, M D (1 member)
- Miller-Young, J (11 members)
- Modeling (7 members)
- Mohamed, S (3 members)
- Mondelli, V (0 members)
- Moolman, M (1 member)
- Mooney, J A (1 member)
- Mowatt, R A (0 members)
- Muráriková, P (1 member)
- Music (6 members)
- Najar, J (1 member)
- Nel, L (4 members)
- Neumann, F (1 member)
- Niebler, C (1 member)
- Norton, S (1 member)
- Online learning (1 member)
- O’Keeffe, G W (1 member)
- Pace, D (16 members)
- Pages with broken file links (3 members)
- Pages with template loops (1 member)
- Palfreyman, N (4 members)
- Pedagogy (2 members)
- Pelnar, H (4 members)
- People (10 members)
- Person (1 member)
- Pettit, J (2 members)
- Phillips, J (1 member)
- Philosophy (2 members)
- Physics (3 members)
- Pilachowski, C A (1 member)
- Pinnow, E (1 member)
- Political science (3 members)
- Poster (1 member)
- Practice (5 members)
- Predicate logic (1 member)
- Presentation (1 member)
- Priss, U (0 members)
- Professional education (2 members)
- Psychology (12 members)
- PublicationType (6 members)
- PublicationYear (26 members)
- PublishedWork (194 members)
- Quintanilla, V D (1 member)
- Quiring, B (0 members)
- Rankin, M (0 members)
- Rathburn, M (2 members)
- Reading (2 members)
- Rechter, S (1 member)
