Classification
380 - Commerce, communications & transportation
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
198
900 - History & geography
172
333 - Economics of land & energy
118
000 - Computer science, information & general works
74
363 - Other social problems & services
62
330 - Economics
47
610 - Medicine & health
41
140 - Specific philosophical schools
37
576 - Genetics & evolution
37
580 - Plants (Botany)
29
720 - Architecture
28
500 - Natural sciences & mathematics
23
320 - Political science
19
630 - Agriculture & related technologies
18
551 - Geology, hydrology & meteorology
17
370 - Education
16
540 - Chemistry & allied sciences
15
340 - Law
13
658 - General management
13
400 - Language
12
300 - Social sciences
10
414 - Phonology & phonetics
10
800 - Literature & rhetoric
10
530 - Physics
7
581 - Specific topics in natural history
7
612 - Human physiology
7
100 - Philosophy & psychology
6
170 - Ethics
4
304 - Factors affecting social behavior
4
780 - Music
4
410 - Linguistics
3
200 - Religion
2
301 - Sociology & anthropology
2
361 - Social problems & social welfare in general
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1
770 - Photography, photographs & computer art
1