Classification
300 - Social sciences
900 - History & geography
247
320 - Political science
172
301 - Sociology & anthropology
159
700 - The arts; fine & decorative arts
153
100 - Philosophy & psychology
147
200 - Religion
95
330 - Economics
87
600 - Technology
84
370 - Education
83
000 - Computer science, information & general works
81
800 - Literature & rhetoric
75
610 - Medicine & health
65
304 - Factors affecting social behavior
59
140 - Specific philosophical schools
56
363 - Other social problems & services
52
333 - Economics of land & energy
51
340 - Law
45
380 - Commerce, communications & transportation
45
500 - Natural sciences & mathematics
41
400 - Language
36
620 - Engineering & allied operations
34
780 - Music
25
576 - Genetics & evolution
24
410 - Linguistics
23
170 - Ethics
22
297 - Islam, Babism & Bahai Faith
21
361 - Social problems & social welfare in general
21
630 - Agriculture & related technologies
21
720 - Architecture
20
364 - Criminology
11
360 - Social problems & services; associations
10
581 - Specific topics in natural history
10
770 - Photography, photographs & computer art
10
398 - Folklore
9
120 - Epistemology, causation & humankind
8
551 - Geology, hydrology & meteorology
8
580 - Plants (Botany)
8
530 - Physics
7
540 - Chemistry & allied sciences
7
658 - General management
5
296 - Judaism
4
350 - Public administration & military science
4
791 - Public performances
4
414 - Phonology & phonetics
3
612 - Human physiology
3
160 - Logic
2
336 - Public finance
1
520 - Astronomy & allied sciences
1
615 - Pharmacology & therapeutics
1