Classification
320 - Political science
330 - Economics
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
25
333 - Economics of land & energy
20
900 - History & geography
18
000 - Computer science, information & general works
16
363 - Other social problems & services
15
380 - Commerce, communications & transportation
8
140 - Specific philosophical schools
7
551 - Geology, hydrology & meteorology
7
630 - Agriculture & related technologies
7
300 - Social sciences
6
370 - Education
6
610 - Medicine & health
6
580 - Plants (Botany)
5
658 - General management
5
100 - Philosophy & psychology
4
581 - Specific topics in natural history
4
530 - Physics
3
720 - Architecture
3
780 - Music
3
170 - Ethics
2
400 - Language
2
410 - Linguistics
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
304 - Factors affecting social behavior
1
340 - Law
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
576 - Genetics & evolution
1
657 - Accounting
1
770 - Photography, photographs & computer art
1
791 - Public performances
1