Classification
363 - Other social problems & services
370 - Education
900 - History & geography
333 - Economics of land & energy
35
600 - Technology
28
620 - Engineering & allied operations
26
700 - The arts; fine & decorative arts
26
330 - Economics
21
380 - Commerce, communications & transportation
17
000 - Computer science, information & general works
15
320 - Political science
13
140 - Specific philosophical schools
12
610 - Medicine & health
12
551 - Geology, hydrology & meteorology
9
720 - Architecture
9
400 - Language
7
200 - Religion
5
500 - Natural sciences & mathematics
5
100 - Philosophy & psychology
4
300 - Social sciences
4
340 - Law
4
576 - Genetics & evolution
4
800 - Literature & rhetoric
4
170 - Ethics
3
304 - Factors affecting social behavior
3
581 - Specific topics in natural history
3
658 - General management
3
297 - Islam, Babism & Bahai Faith
2
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
580 - Plants (Botany)
2
301 - Sociology & anthropology
1
350 - Public administration & military science
1
410 - Linguistics
1
630 - Agriculture & related technologies
1
657 - Accounting
1
770 - Photography, photographs & computer art
1