Classification
900 - History & geography
600 - Technology
129
620 - Engineering & allied operations
125
700 - The arts; fine & decorative arts
94
330 - Economics
73
320 - Political science
70
333 - Economics of land & energy
70
380 - Commerce, communications & transportation
34
000 - Computer science, information & general works
30
300 - Social sciences
29
610 - Medicine & health
26
576 - Genetics & evolution
24
800 - Literature & rhetoric
22
363 - Other social problems & services
21
580 - Plants (Botany)
19
140 - Specific philosophical schools
14
340 - Law
14
200 - Religion
13
500 - Natural sciences & mathematics
13
100 - Philosophy & psychology
11
370 - Education
11
414 - Phonology & phonetics
11
530 - Physics
10
720 - Architecture
10
301 - Sociology & anthropology
9
551 - Geology, hydrology & meteorology
9
630 - Agriculture & related technologies
9
304 - Factors affecting social behavior
8
581 - Specific topics in natural history
4
658 - General management
4
297 - Islam, Babism & Bahai Faith
3
361 - Social problems & social welfare in general
2
400 - Language
2
612 - Human physiology
2
360 - Social problems & services; associations
1
364 - Criminology
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
650 - Management & auxiliary services
1
780 - Music
1
791 - Public performances
1