Materia
- Engineering 5
- Environmental Chemistry 5
- Mathematical Modeling and Methods 5
- Archaeology 4
- History of Science 4
- Language and Linguistics 4
- Mathematics 4
- Nonlinear Science and Fluid Dynamics 4
- Psychology 4
- Engineering: General Interest 3
- General Science 3
- Geography 3
- History of Science: General Interest 3
- Life Sciences 3
- Physics And Astronomy 3
- Recreational Mathematics 3
- Earth and Environmental Sciences 2
- Ecology and Conservation 2
- Electromagnetics 2
- General 2