Classification
900 - History & geography
370 - Education
7
700 - The arts; fine & decorative arts
5
320 - Political science
4
340 - Law
3
100 - Philosophy & psychology
2
330 - Economics
2
344 - Labor, social, education & cultural law
2
400 - Language
2
500 - Natural sciences & mathematics
2
720 - Architecture
2
000 - Computer science, information & general works
1
296 - Judaism
1
300 - Social sciences
1
305 - Social groups
1
331 - Labor economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
600 - Technology
1
770 - Photography, photographs & computer art
1
780 - Music
1
800 - Literature & rhetoric
1
809 - History, description & criticism
1