Materia
- Religion 8
- Social and Population History 8
- Art 7
- Engineering 7
- European Government 7
- European History 450-1000 7
- Russian and East European Government 7
- British History 1066-1450 6
- European History: General Interest 6
- Military History 6
- Archaeology 5
- Computer Science 5
- Global History 5
- Physics And Astronomy 5
- Psychology 5
- Sociology 5
- Classical Studies 4
- Economic History 4
- Economics 4
- English Literature: General Interest 4