Classification
100 - Philosophy & psychology
414 - Phonology & phonetics
400 - Language
7
333 - Economics of land & energy
5
140 - Specific philosophical schools
3
700 - The arts; fine & decorative arts
3
900 - History & geography
3
170 - Ethics
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
370 - Education
1
380 - Commerce, communications & transportation
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
770 - Photography, photographs & computer art
1