Materia
- Military History 6
- Political Economy 6
- Recreational Mathematics 6
- Astrophysics 5
- Classical Literature 5
- Engineering: General Interest 5
- Film 5
- International Trade Law 5
- Philosophy 5
- Philosophy: General Interest 5
- African History 4
- African Studies 4
- Astronomy: General Interest 4
- Civil and Geotechnical Engineering 4
- Developmental Psychology 4
- East Asian History 4
- Ecology and Conservation 4
- Economic History 4
- Economic Thought 4
- History of Ideas 4