Classification
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
333 - Economics of land & energy
82
363 - Other social problems & services
53
000 - Computer science, information & general works
41
700 - The arts; fine & decorative arts
41
600 - Technology
40
900 - History & geography
27
370 - Education
19
340 - Law
17
551 - Geology, hydrology & meteorology
17
300 - Social sciences
15
140 - Specific philosophical schools
14
658 - General management
14
576 - Genetics & evolution
13
610 - Medicine & health
13
630 - Agriculture & related technologies
13
620 - Engineering & allied operations
12
304 - Factors affecting social behavior
8
800 - Literature & rhetoric
8
100 - Philosophy & psychology
7
581 - Specific topics in natural history
7
400 - Language
6
657 - Accounting
6
720 - Architecture
6
170 - Ethics
5
200 - Religion
5
410 - Linguistics
5
580 - Plants (Botany)
5
301 - Sociology & anthropology
4
414 - Phonology & phonetics
4
297 - Islam, Babism & Bahai Faith
3
336 - Public finance
3
350 - Public administration & military science
3
361 - Social problems & social welfare in general
3
500 - Natural sciences & mathematics
3
530 - Physics
3
780 - Music
3
364 - Criminology
1
550 - Earth sciences
1
650 - Management & auxiliary services
1
791 - Public performances
1