Classification
320 - Political science
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
37
330 - Economics
29
620 - Engineering & allied operations
28
000 - Computer science, information & general works
25
900 - History & geography
22
380 - Commerce, communications & transportation
20
551 - Geology, hydrology & meteorology
17
610 - Medicine & health
17
140 - Specific philosophical schools
14
370 - Education
11
720 - Architecture
10
300 - Social sciences
9
581 - Specific topics in natural history
9
576 - Genetics & evolution
8
340 - Law
7
630 - Agriculture & related technologies
7
500 - Natural sciences & mathematics
4
580 - Plants (Botany)
4
658 - General management
4
304 - Factors affecting social behavior
3
361 - Social problems & social welfare in general
3
100 - Philosophy & psychology
2
170 - Ethics
2
200 - Religion
2
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
657 - Accounting
2
800 - Literature & rhetoric
2
350 - Public administration & military science
1
360 - Social problems & services; associations
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
530 - Physics
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
650 - Management & auxiliary services
1