Classification
900 - History & geography
548
320 - Political science
85
700 - The arts; fine & decorative arts
68
300 - Social sciences
54
800 - Literature & rhetoric
51
330 - Economics
42
200 - Religion
34
610 - Medicine & health
32
100 - Philosophy & psychology
30
301 - Sociology & anthropology
28
140 - Specific philosophical schools
27
380 - Commerce, communications & transportation
25
780 - Music
22
370 - Education
20
304 - Factors affecting social behavior
18
340 - Law
17
410 - Linguistics
16
576 - Genetics & evolution
16
333 - Economics of land & energy
14
400 - Language
13
363 - Other social problems & services
12
600 - Technology
12
170 - Ethics
9
720 - Architecture
9
296 - Judaism
8
620 - Engineering & allied operations
8
000 - Computer science, information & general works
7
630 - Agriculture & related technologies
6
297 - Islam, Babism & Bahai Faith
5
361 - Social problems & social welfare in general
5
791 - Public performances
5
551 - Geology, hydrology & meteorology
3
120 - Epistemology, causation & humankind
2
398 - Folklore
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
581 - Specific topics in natural history
2
770 - Photography, photographs & computer art
2
350 - Public administration & military science
1
520 - Astronomy & allied sciences
1
530 - Physics
1
550 - Earth sciences
1
612 - Human physiology
1
658 - General management
1
920 - Biography, genealogy & insignia
1