Classification
000 - Computer science, information & general works
320 - Political science
700 - The arts; fine & decorative arts
150
330 - Economics
145
333 - Economics of land & energy
128
363 - Other social problems & services
104
380 - Commerce, communications & transportation
91
600 - Technology
86
900 - History & geography
70
551 - Geology, hydrology & meteorology
68
300 - Social sciences
60
610 - Medicine & health
45
140 - Specific philosophical schools
43
100 - Philosophy & psychology
38
620 - Engineering & allied operations
36
370 - Education
35
630 - Agriculture & related technologies
30
340 - Law
27
200 - Religion
25
581 - Specific topics in natural history
21
658 - General management
18
576 - Genetics & evolution
17
580 - Plants (Botany)
17
720 - Architecture
16
800 - Literature & rhetoric
16
400 - Language
15
500 - Natural sciences & mathematics
15
301 - Sociology & anthropology
14
304 - Factors affecting social behavior
14
170 - Ethics
12
297 - Islam, Babism & Bahai Faith
10
361 - Social problems & social welfare in general
9
410 - Linguistics
9
530 - Physics
9
540 - Chemistry & allied sciences
9
657 - Accounting
7
414 - Phonology & phonetics
6
550 - Earth sciences
5
120 - Epistemology, causation & humankind
3
780 - Music
3
791 - Public performances
3
350 - Public administration & military science
2
360 - Social problems & services; associations
2
520 - Astronomy & allied sciences
2
770 - Photography, photographs & computer art
2
364 - Criminology
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1