Classification
500 - Natural sciences & mathematics
900 - History & geography
620 - Engineering & allied operations
91
600 - Technology
88
700 - The arts; fine & decorative arts
72
333 - Economics of land & energy
56
140 - Specific philosophical schools
27
330 - Economics
27
610 - Medicine & health
25
000 - Computer science, information & general works
23
100 - Philosophy & psychology
23
370 - Education
22
380 - Commerce, communications & transportation
22
800 - Literature & rhetoric
22
363 - Other social problems & services
21
320 - Political science
20
300 - Social sciences
18
576 - Genetics & evolution
18
340 - Law
17
540 - Chemistry & allied sciences
14
530 - Physics
13
720 - Architecture
13
400 - Language
11
580 - Plants (Botany)
11
590 - Animals (Zoology)
11
301 - Sociology & anthropology
7
414 - Phonology & phonetics
6
120 - Epistemology, causation & humankind
5
658 - General management
5
780 - Music
4
160 - Logic
3
170 - Ethics
3
200 - Religion
3
304 - Factors affecting social behavior
3
410 - Linguistics
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
297 - Islam, Babism & Bahai Faith
2
361 - Social problems & social welfare in general
2
520 - Astronomy & allied sciences
2
630 - Agriculture & related technologies
2
336 - Public finance
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1