Classification
000 - Computer science, information & general works
363 - Other social problems & services
700 - The arts; fine & decorative arts
900 - History & geography
5
330 - Economics
4
600 - Technology
4
620 - Engineering & allied operations
4
333 - Economics of land & energy
3
610 - Medicine & health
3
140 - Specific philosophical schools
2
370 - Education
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1