Classification
900 - History & geography
320 - Political science
50
100 - Philosophy & psychology
42
800 - Literature & rhetoric
38
700 - The arts; fine & decorative arts
36
300 - Social sciences
20
140 - Specific philosophical schools
18
380 - Commerce, communications & transportation
14
791 - Public performances
14
370 - Education
13
200 - Religion
12
301 - Sociology & anthropology
12
330 - Economics
11
340 - Law
10
610 - Medicine & health
9
170 - Ethics
8
576 - Genetics & evolution
8
600 - Technology
8
333 - Economics of land & energy
7
000 - Computer science, information & general works
6
780 - Music
6
304 - Factors affecting social behavior
5
363 - Other social problems & services
5
410 - Linguistics
5
120 - Epistemology, causation & humankind
4
581 - Specific topics in natural history
4
620 - Engineering & allied operations
3
720 - Architecture
3
500 - Natural sciences & mathematics
2
770 - Photography, photographs & computer art
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
364 - Criminology
1
400 - Language
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
612 - Human physiology
1
630 - Agriculture & related technologies
1