Classification
140 - Specific philosophical schools
330 - Economics
333 - Economics of land & energy
19
700 - The arts; fine & decorative arts
19
363 - Other social problems & services
14
600 - Technology
14
000 - Computer science, information & general works
13
610 - Medicine & health
13
370 - Education
10
900 - History & geography
10
380 - Commerce, communications & transportation
9
620 - Engineering & allied operations
8
320 - Political science
7
551 - Geology, hydrology & meteorology
6
658 - General management
6
340 - Law
4
720 - Architecture
4
400 - Language
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
581 - Specific topics in natural history
3
300 - Social sciences
2
304 - Factors affecting social behavior
2
530 - Physics
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
338 - Production
1
360 - Social problems & services; associations
1
414 - Phonology & phonetics
1
657 - Accounting
1
780 - Music
1