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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
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4 · Society, Civilization, Culture
46 · social and economic life, transport and communication
46E · post, telegraph and telephone; means of communication
46E4 · visual signalling
46E41 · flags (~ signalling)
46E412 · manual signalling with flags