Classification
000 - Computer science, information & general works
320 - Political science
363 - Other social problems & services
330 - Economics
66
700 - The arts; fine & decorative arts
66
333 - Economics of land & energy
65
551 - Geology, hydrology & meteorology
38
600 - Technology
35
380 - Commerce, communications & transportation
29
610 - Medicine & health
24
140 - Specific philosophical schools
23
900 - History & geography
22
630 - Agriculture & related technologies
19
620 - Engineering & allied operations
17
300 - Social sciences
15
370 - Education
14
581 - Specific topics in natural history
14
576 - Genetics & evolution
11
304 - Factors affecting social behavior
10
340 - Law
10
580 - Plants (Botany)
9
658 - General management
9
200 - Religion
7
301 - Sociology & anthropology
7
100 - Philosophy & psychology
6
720 - Architecture
6
361 - Social problems & social welfare in general
5
800 - Literature & rhetoric
5
540 - Chemistry & allied sciences
4
410 - Linguistics
3
414 - Phonology & phonetics
3
550 - Earth sciences
3
297 - Islam, Babism & Bahai Faith
2
400 - Language
2
500 - Natural sciences & mathematics
2
530 - Physics
2
657 - Accounting
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1