Classification
900 - History & geography
23
700 - The arts; fine & decorative arts
11
320 - Political science
7
140 - Specific philosophical schools
5
200 - Religion
5
800 - Literature & rhetoric
4
100 - Philosophy & psychology
3
410 - Linguistics
3
780 - Music
3
170 - Ethics
2
301 - Sociology & anthropology
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
296 - Judaism
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
305 - Social groups
1
330 - Economics
1
340 - Law
1
398 - Folklore
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
820 - English & Old English literatures
1
940 - History of Europe
1
943 - Central Europe; Germany
1
949 - Other parts of Europe
1