Classification
600 - Technology
140 - Specific philosophical schools
415
700 - The arts; fine & decorative arts
195
620 - Engineering & allied operations
178
900 - History & geography
145
000 - Computer science, information & general works
133
610 - Medicine & health
121
333 - Economics of land & energy
118
363 - Other social problems & services
100
330 - Economics
90
380 - Commerce, communications & transportation
84
320 - Political science
56
300 - Social sciences
39
100 - Philosophy & psychology
38
370 - Education
38
580 - Plants (Botany)
37
630 - Agriculture & related technologies
31
170 - Ethics
28
400 - Language
28
576 - Genetics & evolution
28
340 - Law
27
551 - Geology, hydrology & meteorology
27
658 - General management
24
500 - Natural sciences & mathematics
23
581 - Specific topics in natural history
21
720 - Architecture
20
800 - Literature & rhetoric
19
304 - Factors affecting social behavior
16
301 - Sociology & anthropology
15
410 - Linguistics
13
540 - Chemistry & allied sciences
13
200 - Religion
12
361 - Social problems & social welfare in general
10
612 - Human physiology
10
530 - Physics
9
780 - Music
9
120 - Epistemology, causation & humankind
5
414 - Phonology & phonetics
5
615 - Pharmacology & therapeutics
4
160 - Logic
2
364 - Criminology
2
657 - Accounting
2
153 - Mental processes & intelligence
1
297 - Islam, Babism & Bahai Faith
1
331 - Labor economics
1
336 - Public finance
1
338 - Production
1
350 - Public administration & military science
1
629 - Other branches of engineering
1
650 - Management & auxiliary services
1
more ...