Classification
170 - Ethics
700 - The arts; fine & decorative arts
100 - Philosophy & psychology
45
320 - Political science
39
140 - Specific philosophical schools
38
600 - Technology
30
200 - Religion
26
330 - Economics
26
340 - Law
25
900 - History & geography
24
363 - Other social problems & services
23
610 - Medicine & health
23
333 - Economics of land & energy
19
000 - Computer science, information & general works
15
620 - Engineering & allied operations
14
300 - Social sciences
12
370 - Education
12
800 - Literature & rhetoric
10
380 - Commerce, communications & transportation
9
551 - Geology, hydrology & meteorology
8
630 - Agriculture & related technologies
8
530 - Physics
7
576 - Genetics & evolution
7
580 - Plants (Botany)
7
581 - Specific topics in natural history
7
120 - Epistemology, causation & humankind
6
301 - Sociology & anthropology
6
361 - Social problems & social welfare in general
4
400 - Language
4
720 - Architecture
4
297 - Islam, Babism & Bahai Faith
3
304 - Factors affecting social behavior
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
658 - General management
3
296 - Judaism
2
350 - Public administration & military science
2
780 - Music
2
360 - Social problems & services; associations
1
364 - Criminology
1
398 - Folklore
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
612 - Human physiology
1