Classification
370 - Education
620 - Engineering & allied operations
600 - Technology
81
900 - History & geography
56
700 - The arts; fine & decorative arts
53
333 - Economics of land & energy
50
330 - Economics
41
363 - Other social problems & services
39
000 - Computer science, information & general works
29
610 - Medicine & health
24
500 - Natural sciences & mathematics
23
380 - Commerce, communications & transportation
21
140 - Specific philosophical schools
20
100 - Philosophy & psychology
17
320 - Political science
15
300 - Social sciences
14
400 - Language
13
720 - Architecture
11
576 - Genetics & evolution
8
780 - Music
8
340 - Law
7
540 - Chemistry & allied sciences
7
658 - General management
7
551 - Geology, hydrology & meteorology
6
580 - Plants (Botany)
6
657 - Accounting
5
304 - Factors affecting social behavior
4
530 - Physics
4
630 - Agriculture & related technologies
4
120 - Epistemology, causation & humankind
3
410 - Linguistics
3
581 - Specific topics in natural history
3
170 - Ethics
2
301 - Sociology & anthropology
2
800 - Literature & rhetoric
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
520 - Astronomy & allied sciences
1
612 - Human physiology
1
770 - Photography, photographs & computer art
1
791 - Public performances
1