Classification
000 - Computer science, information & general works
600 - Technology
700 - The arts; fine & decorative arts
9
140 - Specific philosophical schools
7
620 - Engineering & allied operations
7
330 - Economics
5
333 - Economics of land & energy
5
363 - Other social problems & services
5
370 - Education
4
630 - Agriculture & related technologies
4
900 - History & geography
4
300 - Social sciences
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
320 - Political science
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
658 - General management
2
770 - Photography, photographs & computer art
2
780 - Music
2
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
340 - Law
1
530 - Physics
1
612 - Human physiology
1
800 - Literature & rhetoric
1