Classification
330 - Economics
700 - The arts; fine & decorative arts
780 - Music
320 - Political science
13
900 - History & geography
12
600 - Technology
10
100 - Philosophy & psychology
8
300 - Social sciences
7
400 - Language
6
620 - Engineering & allied operations
6
770 - Photography, photographs & computer art
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
370 - Education
4
380 - Commerce, communications & transportation
4
410 - Linguistics
4
630 - Agriculture & related technologies
3
720 - Architecture
3
140 - Specific philosophical schools
2
340 - Law
2
658 - General management
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
530 - Physics
1
800 - Literature & rhetoric
1