Classification
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
333 - Economics of land & energy
72
700 - The arts; fine & decorative arts
66
000 - Computer science, information & general works
52
320 - Political science
45
600 - Technology
43
610 - Medicine & health
43
551 - Geology, hydrology & meteorology
38
380 - Commerce, communications & transportation
33
620 - Engineering & allied operations
29
900 - History & geography
23
581 - Specific topics in natural history
22
580 - Plants (Botany)
16
630 - Agriculture & related technologies
16
370 - Education
15
300 - Social sciences
14
340 - Law
12
576 - Genetics & evolution
9
720 - Architecture
9
170 - Ethics
8
658 - General management
8
100 - Philosophy & psychology
7
304 - Factors affecting social behavior
7
800 - Literature & rhetoric
7
301 - Sociology & anthropology
6
540 - Chemistry & allied sciences
6
400 - Language
5
500 - Natural sciences & mathematics
5
297 - Islam, Babism & Bahai Faith
4
200 - Religion
3
414 - Phonology & phonetics
3
612 - Human physiology
3
657 - Accounting
3
361 - Social problems & social welfare in general
2
410 - Linguistics
2
160 - Logic
1
336 - Public finance
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
530 - Physics
1
550 - Earth sciences
1
780 - Music
1