Classification
900 - History & geography
300 - Social sciences
361
320 - Political science
122
301 - Sociology & anthropology
114
100 - Philosophy & psychology
84
330 - Economics
73
700 - The arts; fine & decorative arts
64
140 - Specific philosophical schools
47
600 - Technology
47
800 - Literature & rhetoric
43
200 - Religion
42
610 - Medicine & health
37
333 - Economics of land & energy
36
370 - Education
34
340 - Law
27
620 - Engineering & allied operations
24
363 - Other social problems & services
22
304 - Factors affecting social behavior
21
400 - Language
20
380 - Commerce, communications & transportation
18
720 - Architecture
18
410 - Linguistics
17
780 - Music
16
576 - Genetics & evolution
15
170 - Ethics
13
000 - Computer science, information & general works
12
630 - Agriculture & related technologies
12
297 - Islam, Babism & Bahai Faith
9
500 - Natural sciences & mathematics
9
530 - Physics
8
364 - Criminology
7
398 - Folklore
7
120 - Epistemology, causation & humankind
6
581 - Specific topics in natural history
6
770 - Photography, photographs & computer art
6
160 - Logic
4
350 - Public administration & military science
4
361 - Social problems & social welfare in general
3
551 - Geology, hydrology & meteorology
3
658 - General management
3
001 - Knowledge
2
360 - Social problems & services; associations
2
540 - Chemistry & allied sciences
2
261 - Social theology
1
270 - History of Christianity & Christian church
1
296 - Judaism
1
306 - Culture & institutions
1
338 - Production
1
550 - Earth sciences
1
791 - Public performances
1