Classification
140 - Specific philosophical schools
600 - Technology
700 - The arts; fine & decorative arts
201
620 - Engineering & allied operations
183
900 - History & geography
147
000 - Computer science, information & general works
134
610 - Medicine & health
121
333 - Economics of land & energy
120
363 - Other social problems & services
103
330 - Economics
93
380 - Commerce, communications & transportation
87
320 - Political science
53
370 - Education
39
580 - Plants (Botany)
39
630 - Agriculture & related technologies
33
170 - Ethics
31
100 - Philosophy & psychology
30
576 - Genetics & evolution
30
400 - Language
28
340 - Law
25
551 - Geology, hydrology & meteorology
25
300 - Social sciences
24
500 - Natural sciences & mathematics
23
658 - General management
23
720 - Architecture
22
800 - Literature & rhetoric
22
581 - Specific topics in natural history
21
304 - Factors affecting social behavior
16
410 - Linguistics
13
540 - Chemistry & allied sciences
13
200 - Religion
12
301 - Sociology & anthropology
11
361 - Social problems & social welfare in general
10
612 - Human physiology
10
530 - Physics
9
780 - Music
7
414 - Phonology & phonetics
6
615 - Pharmacology & therapeutics
4
120 - Epistemology, causation & humankind
3
297 - Islam, Babism & Bahai Faith
2
364 - Criminology
2
657 - Accounting
2
160 - Logic
1
336 - Public finance
1
338 - Production
1
350 - Public administration & military science
1
550 - Earth sciences
1
770 - Photography, photographs & computer art
1
791 - Public performances
1