Classification
370 - Education
900 - History & geography
27
320 - Political science
26
380 - Commerce, communications & transportation
17
333 - Economics of land & energy
15
330 - Economics
13
300 - Social sciences
12
400 - Language
12
600 - Technology
12
700 - The arts; fine & decorative arts
12
363 - Other social problems & services
11
140 - Specific philosophical schools
9
410 - Linguistics
9
100 - Philosophy & psychology
8
620 - Engineering & allied operations
7
000 - Computer science, information & general works
6
610 - Medicine & health
6
800 - Literature & rhetoric
6
304 - Factors affecting social behavior
4
301 - Sociology & anthropology
2
340 - Law
2
361 - Social problems & social welfare in general
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
630 - Agriculture & related technologies
2
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
550 - Earth sciences
1
580 - Plants (Botany)
1
657 - Accounting
1
658 - General management
1
780 - Music
1