Classification
333 - Economics of land & energy
700 - The arts; fine & decorative arts
780 - Music
370 - Education
9
900 - History & geography
6
320 - Political science
5
610 - Medicine & health
4
000 - Computer science, information & general works
3
330 - Economics
3
600 - Technology
3
100 - Philosophy & psychology
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
620 - Engineering & allied operations
2
770 - Photography, photographs & computer art
2
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1