Classification
333 - Economics of land & energy
370 - Education
700 - The arts; fine & decorative arts
43
300 - Social sciences
34
363 - Other social problems & services
33
900 - History & geography
31
600 - Technology
29
330 - Economics
28
500 - Natural sciences & mathematics
27
610 - Medicine & health
27
000 - Computer science, information & general works
26
100 - Philosophy & psychology
24
320 - Political science
23
620 - Engineering & allied operations
22
380 - Commerce, communications & transportation
19
140 - Specific philosophical schools
18
400 - Language
15
551 - Geology, hydrology & meteorology
11
658 - General management
9
581 - Specific topics in natural history
7
630 - Agriculture & related technologies
7
340 - Law
6
580 - Plants (Botany)
6
800 - Literature & rhetoric
6
530 - Physics
5
200 - Religion
4
540 - Chemistry & allied sciences
4
576 - Genetics & evolution
4
120 - Epistemology, causation & humankind
3
170 - Ethics
3
410 - Linguistics
3
720 - Architecture
3
770 - Photography, photographs & computer art
3
301 - Sociology & anthropology
2
336 - Public finance
2
520 - Astronomy & allied sciences
2
657 - Accounting
2
780 - Music
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1