Classification
330 - Economics
9,886
658 - General management
5,637
320 - Political science
2,435
006 - Special computer methods
2,433
005 - Computer programming, programs & data
2,234
333 - Economics of land & energy
1,543
300 - Social sciences
1,496
610 - Medicine & health
1,436
331 - Labor economics
1,327
620 - Engineering & allied operations
1,266
500 - Natural sciences & mathematics
1,253
338 - Production
1,251
004 - Data processing & computer science
1,203
000 - Computer science, information & general works
1,044
302 - Social interaction
1,000
363 - Other social problems & services
997
670 - Manufacturing
876
621 - Applied physics
792
650 - Management & auxiliary services
775
304 - Factors affecting social behavior
761
616 - Diseases
732
820 - English & Old English literatures
718
700 - The arts; fine & decorative arts
691
332 - Financial economics
607
380 - Commerce, communications & transportation
583
900 - History & geography
569
381 - Commerce
568
600 - Technology
556
370 - Education
546
629 - Other branches of engineering
508
551 - Geology, hydrology & meteorology
489
384 - Communications; telecommunication
478
340 - Law
470
617 - Surgery & related medical specialties
422
158 - Applied psychology
418
745 - Decorative arts
417
720 - Architecture
413
630 - Agriculture & related technologies
373
003 - Systems
327
577 - Ecology
317
307 - Communities
311
910 - Geography & travel
300
374 - Adult education
294
519 - Probabilities & applied mathematics
290
153 - Mental processes & intelligence
285
001 - Knowledge
265
520 - Astronomy & allied sciences
250
306 - Culture & institutions
214
140 - Specific philosophical schools
204
339 - Macroeconomics & related topics
177
more ...