Classification
530 - Physics
380 - Commerce, communications & transportation
4
000 - Computer science, information & general works
3
320 - Political science
3
333 - Economics of land & energy
3
600 - Technology
3
100 - Philosophy & psychology
2
330 - Economics
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
170 - Ethics
1
200 - Religion
1
296 - Judaism
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
346 - Private law
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1
780 - Music
1
900 - History & geography
1