Classification
363 - Other social problems & services
900 - History & geography
50
700 - The arts; fine & decorative arts
23
000 - Computer science, information & general works
17
330 - Economics
16
320 - Political science
12
301 - Sociology & anthropology
11
620 - Engineering & allied operations
11
333 - Economics of land & energy
10
581 - Specific topics in natural history
10
600 - Technology
10
140 - Specific philosophical schools
9
300 - Social sciences
9
380 - Commerce, communications & transportation
9
400 - Language
6
551 - Geology, hydrology & meteorology
6
200 - Religion
5
720 - Architecture
5
370 - Education
4
540 - Chemistry & allied sciences
4
100 - Philosophy & psychology
3
340 - Law
3
414 - Phonology & phonetics
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
530 - Physics
2
610 - Medicine & health
2
920 - Biography, genealogy & insignia
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
364 - Criminology
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
590 - Animals (Zoology)
1
628 - Sanitary & municipal engineering
1
780 - Music
1