Classification
140 - Specific philosophical schools
330 - Economics
320 - Political science
175
700 - The arts; fine & decorative arts
141
333 - Economics of land & energy
138
363 - Other social problems & services
119
610 - Medicine & health
110
600 - Technology
95
000 - Computer science, information & general works
91
900 - History & geography
71
380 - Commerce, communications & transportation
68
300 - Social sciences
54
551 - Geology, hydrology & meteorology
48
370 - Education
46
620 - Engineering & allied operations
46
100 - Philosophy & psychology
37
340 - Law
36
658 - General management
28
170 - Ethics
26
576 - Genetics & evolution
26
630 - Agriculture & related technologies
26
304 - Factors affecting social behavior
24
581 - Specific topics in natural history
24
580 - Plants (Botany)
22
301 - Sociology & anthropology
16
200 - Religion
15
800 - Literature & rhetoric
15
500 - Natural sciences & mathematics
14
720 - Architecture
14
400 - Language
13
361 - Social problems & social welfare in general
8
540 - Chemistry & allied sciences
8
297 - Islam, Babism & Bahai Faith
7
410 - Linguistics
5
657 - Accounting
5
350 - Public administration & military science
4
780 - Music
4
414 - Phonology & phonetics
3
530 - Physics
3
612 - Human physiology
3
770 - Photography, photographs & computer art
3
160 - Logic
2
336 - Public finance
2
360 - Social problems & services; associations
2
550 - Earth sciences
2
120 - Epistemology, causation & humankind
1
338 - Production
1
364 - Criminology
1
615 - Pharmacology & therapeutics
1