Classification
370 - Education
620 - Engineering & allied operations
900 - History & geography
600 - Technology
11
700 - The arts; fine & decorative arts
10
333 - Economics of land & energy
7
363 - Other social problems & services
5
000 - Computer science, information & general works
4
330 - Economics
4
380 - Commerce, communications & transportation
4
140 - Specific philosophical schools
3
400 - Language
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
770 - Photography, photographs & computer art
1
780 - Music
1