Classification
320 - Political science
600 - Technology
75
333 - Economics of land & energy
48
620 - Engineering & allied operations
46
700 - The arts; fine & decorative arts
39
330 - Economics
37
900 - History & geography
35
363 - Other social problems & services
34
000 - Computer science, information & general works
26
551 - Geology, hydrology & meteorology
20
380 - Commerce, communications & transportation
18
610 - Medicine & health
12
370 - Education
9
658 - General management
9
580 - Plants (Botany)
7
140 - Specific philosophical schools
6
576 - Genetics & evolution
5
720 - Architecture
5
581 - Specific topics in natural history
4
630 - Agriculture & related technologies
4
100 - Philosophy & psychology
3
170 - Ethics
3
300 - Social sciences
3
340 - Law
3
414 - Phonology & phonetics
3
657 - Accounting
3
800 - Literature & rhetoric
3
400 - Language
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1
530 - Physics
1
540 - Chemistry & allied sciences
1