Classification
320 - Political science
400 - Language
330 - Economics
68
900 - History & geography
47
410 - Linguistics
36
700 - The arts; fine & decorative arts
36
100 - Philosophy & psychology
23
170 - Ethics
21
370 - Education
21
300 - Social sciences
17
380 - Commerce, communications & transportation
15
000 - Computer science, information & general works
14
800 - Literature & rhetoric
13
333 - Economics of land & energy
12
200 - Religion
11
140 - Specific philosophical schools
10
297 - Islam, Babism & Bahai Faith
10
340 - Law
10
301 - Sociology & anthropology
9
600 - Technology
9
620 - Engineering & allied operations
7
780 - Music
7
363 - Other social problems & services
6
610 - Medicine & health
5
581 - Specific topics in natural history
4
120 - Epistemology, causation & humankind
3
304 - Factors affecting social behavior
3
414 - Phonology & phonetics
3
720 - Architecture
3
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
658 - General management
2
296 - Judaism
1
306 - Culture & institutions
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
530 - Physics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1
770 - Photography, photographs & computer art
1
891 - East Indo-European & Celtic literatures
1