Classification
000 - Computer science, information & general works
700 - The arts; fine & decorative arts
25
370 - Education
21
333 - Economics of land & energy
19
363 - Other social problems & services
17
600 - Technology
16
330 - Economics
15
610 - Medicine & health
15
320 - Political science
12
140 - Specific philosophical schools
11
380 - Commerce, communications & transportation
10
100 - Philosophy & psychology
7
400 - Language
6
551 - Geology, hydrology & meteorology
6
620 - Engineering & allied operations
6
658 - General management
6
170 - Ethics
4
200 - Religion
4
900 - History & geography
4
297 - Islam, Babism & Bahai Faith
3
500 - Natural sciences & mathematics
3
530 - Physics
3
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
300 - Social sciences
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
350 - Public administration & military science
2
580 - Plants (Botany)
2
657 - Accounting
2
340 - Law
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
410 - Linguistics
1
414 - Phonology & phonetics
1
720 - Architecture
1
780 - Music
1