Classification
330 - Economics
363 - Other social problems & services
700 - The arts; fine & decorative arts
333 - Economics of land & energy
161
000 - Computer science, information & general works
131
600 - Technology
114
320 - Political science
88
620 - Engineering & allied operations
76
900 - History & geography
72
140 - Specific philosophical schools
66
551 - Geology, hydrology & meteorology
66
610 - Medicine & health
64
380 - Commerce, communications & transportation
60
630 - Agriculture & related technologies
40
580 - Plants (Botany)
36
370 - Education
30
658 - General management
29
581 - Specific topics in natural history
25
300 - Social sciences
21
340 - Law
20
720 - Architecture
17
800 - Literature & rhetoric
16
500 - Natural sciences & mathematics
15
540 - Chemistry & allied sciences
14
576 - Genetics & evolution
14
304 - Factors affecting social behavior
13
100 - Philosophy & psychology
12
301 - Sociology & anthropology
12
200 - Religion
10
400 - Language
10
414 - Phonology & phonetics
7
297 - Islam, Babism & Bahai Faith
6
410 - Linguistics
6
530 - Physics
6
170 - Ethics
5
657 - Accounting
5
612 - Human physiology
4
520 - Astronomy & allied sciences
3
160 - Logic
2
350 - Public administration & military science
2
361 - Social problems & social welfare in general
2
550 - Earth sciences
2
615 - Pharmacology & therapeutics
2
120 - Epistemology, causation & humankind
1
360 - Social problems & services; associations
1
650 - Management & auxiliary services
1