Classification
320 - Political science
64
973 - United States
39
306 - Culture & institutions
31
004 - Data processing & computer science
29
005 - Computer programming, programs & data
22
006 - Special computer methods
21
518 - Numerical analysis
19
327 - International relations
16
401 - Philosophy & theory
15
900 - History & geography
15
040 - [Unassigned]
14
791 - Public performances
13
909 - World history
13
940 - History of Europe
8
302 - Social interaction
6
509 - Historical, geographic & persons treatment
5
621 - Applied physics
5
338 - Production
4
511 - General principles of mathematics
4
003 - Systems
3
339 - Macroeconomics & related topics
3
355 - Military science
3
512 - Algebra
3
809 - History, description & criticism
3
960 - History of Africa
3
200 - Religion
2
305 - Social groups
2
363 - Other social problems & services
2
370 - Education
2
570 - Life sciences; biology
2
641 - Food & drink
2
664 - Food technology
2
792 - Stage presentations
2
907 - Education, research & related topics
2
941 - British Isles
2
025 - Library operations
1
090 - Manuscripts & rare books
1
109 - Historical & collected persons treatment
1
300 - Social sciences
1
301 - Sociology & anthropology
1
303 - Social processes
1
304 - Factors affecting social behavior
1
307 - Communities
1
321 - Systems of governments & states
1
325 - International migration & colonization
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
371 - Schools & their activities; special education
1
375 - Curricula
1
379 - Public policy issues in education
1
more ...