Classification
320 - Political science
333 - Economics of land & energy
330 - Economics
313
363 - Other social problems & services
184
700 - The arts; fine & decorative arts
167
600 - Technology
132
000 - Computer science, information & general works
128
900 - History & geography
111
380 - Commerce, communications & transportation
93
551 - Geology, hydrology & meteorology
88
300 - Social sciences
84
140 - Specific philosophical schools
81
610 - Medicine & health
80
370 - Education
78
620 - Engineering & allied operations
61
340 - Law
52
630 - Agriculture & related technologies
43
581 - Specific topics in natural history
39
100 - Philosophy & psychology
38
304 - Factors affecting social behavior
30
720 - Architecture
25
200 - Religion
22
170 - Ethics
21
658 - General management
21
576 - Genetics & evolution
20
301 - Sociology & anthropology
18
361 - Social problems & social welfare in general
18
800 - Literature & rhetoric
17
580 - Plants (Botany)
16
400 - Language
15
410 - Linguistics
11
500 - Natural sciences & mathematics
11
297 - Islam, Babism & Bahai Faith
10
350 - Public administration & military science
10
530 - Physics
10
540 - Chemistry & allied sciences
8
657 - Accounting
7
780 - Music
7
414 - Phonology & phonetics
6
336 - Public finance
5
120 - Epistemology, causation & humankind
3
550 - Earth sciences
3
296 - Judaism
2
360 - Social problems & services; associations
2
364 - Criminology
2
520 - Astronomy & allied sciences
2
615 - Pharmacology & therapeutics
2
770 - Photography, photographs & computer art
2
650 - Management & auxiliary services
1