Classification
140 - Specific philosophical schools
700 - The arts; fine & decorative arts
66
900 - History & geography
55
380 - Commerce, communications & transportation
52
600 - Technology
51
000 - Computer science, information & general works
47
300 - Social sciences
47
320 - Political science
38
330 - Economics
31
370 - Education
31
610 - Medicine & health
31
363 - Other social problems & services
27
100 - Philosophy & psychology
25
333 - Economics of land & energy
24
800 - Literature & rhetoric
21
340 - Law
16
576 - Genetics & evolution
14
304 - Factors affecting social behavior
13
400 - Language
12
620 - Engineering & allied operations
12
200 - Religion
10
301 - Sociology & anthropology
10
170 - Ethics
9
551 - Geology, hydrology & meteorology
9
581 - Specific topics in natural history
9
658 - General management
8
780 - Music
7
410 - Linguistics
5
630 - Agriculture & related technologies
5
120 - Epistemology, causation & humankind
4
297 - Islam, Babism & Bahai Faith
3
361 - Social problems & social welfare in general
3
414 - Phonology & phonetics
3
530 - Physics
3
580 - Plants (Botany)
3
770 - Photography, photographs & computer art
3
791 - Public performances
3
500 - Natural sciences & mathematics
2
720 - Architecture
2
160 - Logic
1
302 - Social interaction
1
305 - Social groups
1
350 - Public administration & military science
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1