Classification
330 - Economics
340 - Law
600 - Technology
900 - History & geography
620 - Engineering & allied operations
14
380 - Commerce, communications & transportation
11
700 - The arts; fine & decorative arts
8
320 - Political science
7
333 - Economics of land & energy
6
300 - Social sciences
5
000 - Computer science, information & general works
4
370 - Education
4
500 - Natural sciences & mathematics
4
100 - Philosophy & psychology
3
140 - Specific philosophical schools
3
301 - Sociology & anthropology
3
363 - Other social problems & services
3
400 - Language
3
576 - Genetics & evolution
3
170 - Ethics
2
200 - Religion
2
304 - Factors affecting social behavior
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
658 - General management
2
780 - Music
2
410 - Linguistics
1
414 - Phonology & phonetics
1
630 - Agriculture & related technologies
1
657 - Accounting
1
770 - Photography, photographs & computer art
1