Classification
140 - Specific philosophical schools
620 - Engineering & allied operations
133
900 - History & geography
600 - Technology
126
700 - The arts; fine & decorative arts
84
333 - Economics of land & energy
45
380 - Commerce, communications & transportation
43
363 - Other social problems & services
42
000 - Computer science, information & general works
31
610 - Medicine & health
28
330 - Economics
26
720 - Architecture
23
580 - Plants (Botany)
18
320 - Political science
13
400 - Language
13
340 - Law
12
576 - Genetics & evolution
12
370 - Education
11
551 - Geology, hydrology & meteorology
11
630 - Agriculture & related technologies
10
300 - Social sciences
8
500 - Natural sciences & mathematics
8
800 - Literature & rhetoric
8
581 - Specific topics in natural history
6
658 - General management
6
170 - Ethics
5
304 - Factors affecting social behavior
5
100 - Philosophy & psychology
4
301 - Sociology & anthropology
3
612 - Human physiology
3
297 - Islam, Babism & Bahai Faith
2
410 - Linguistics
2
414 - Phonology & phonetics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
780 - Music
2
200 - Religion
1
361 - Social problems & social welfare in general
1