Classification
363 - Other social problems & services
320 - Political science
326
333 - Economics of land & energy
275
330 - Economics
160
700 - The arts; fine & decorative arts
100
600 - Technology
79
000 - Computer science, information & general works
77
380 - Commerce, communications & transportation
66
551 - Geology, hydrology & meteorology
65
900 - History & geography
62
630 - Agriculture & related technologies
56
610 - Medicine & health
52
620 - Engineering & allied operations
51
140 - Specific philosophical schools
42
304 - Factors affecting social behavior
34
300 - Social sciences
27
581 - Specific topics in natural history
23
576 - Genetics & evolution
22
370 - Education
19
580 - Plants (Botany)
19
720 - Architecture
18
340 - Law
17
658 - General management
14
301 - Sociology & anthropology
12
540 - Chemistry & allied sciences
10
800 - Literature & rhetoric
8
100 - Philosophy & psychology
7
200 - Religion
6
336 - Public finance
6
400 - Language
6
414 - Phonology & phonetics
6
500 - Natural sciences & mathematics
6
344 - Labor, social, education & cultural law
5
410 - Linguistics
5
550 - Earth sciences
4
297 - Islam, Babism & Bahai Faith
3
530 - Physics
3
628 - Sanitary & municipal engineering
3
520 - Astronomy & allied sciences
2
590 - Animals (Zoology)
2
650 - Management & auxiliary services
2
780 - Music
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1
770 - Photography, photographs & computer art
1