Classification
330 - Economics
370 - Education
333 - Economics of land & energy
30
600 - Technology
26
700 - The arts; fine & decorative arts
25
363 - Other social problems & services
22
900 - History & geography
21
380 - Commerce, communications & transportation
20
320 - Political science
18
000 - Computer science, information & general works
16
610 - Medicine & health
15
140 - Specific philosophical schools
14
620 - Engineering & allied operations
14
658 - General management
9
551 - Geology, hydrology & meteorology
8
720 - Architecture
6
200 - Religion
5
300 - Social sciences
5
304 - Factors affecting social behavior
5
400 - Language
4
800 - Literature & rhetoric
4
576 - Genetics & evolution
3
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
100 - Philosophy & psychology
2
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
340 - Law
2
350 - Public administration & military science
2
414 - Phonology & phonetics
2
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
657 - Accounting
1
770 - Photography, photographs & computer art
1