1 · Religion and Magic
2 · Nature
3 · Human Being, Man in General
4 · Society, Civilization, Culture
5 · Abstract Ideas and Concepts
6 · History
7 · Bible
8 · Literature
9 · Classical Mythology and Ancient History
Top
4 · Society, Civilization, Culture
49 · education, science and learning
49E · science and technology
49E9 · experiment, test ~ science and technology
49E91 · invention, discovery ~ science and technology
49E9(+0) · experiment, test ~ science and technology (+ variant)
49E9(+1) · experiment, test ~ science and technology (+ scholar, scientist (at work))