Materia
- Education 17
- Engineering 17
- Religion: General Interest 16
- Social and Population History 16
- Ancient History 15
- Church History 15
- Recreational Mathematics 15
- Classical Literature 14
- Regional and World History: General Interest 14
- Philosophy 13
- Philosophy and Foundations of Physics 13
- Political Sociology 13
- Politics: General Interest 13
- Archaeology 12
- Classical Studies 12
- Economic Development and Growth 12
- Economic History 12
- General Science 12
- Global History 12
- History of Ideas and Intellectual History 12