Classification
658 - General management
10,893
616 - Diseases
10,582
006 - Special computer methods
9,920
005 - Computer programming, programs & data
9,590
621 - Applied physics
9,114
004 - Data processing & computer science
7,262
620 - Engineering & allied operations
6,329
610 - Medicine & health
3,867
306 - Culture & institutions
3,558
617 - Surgery & related medical specialties
3,445
320 - Political science
3,428
629 - Other branches of engineering
3,159
530 - Physics
2,927
571 - Physiology & related subjects
2,727
519 - Probabilities & applied mathematics
2,722
515 - Analysis
2,524
370 - Education
2,492
338 - Production
2,311
333 - Economics of land & energy
2,190
304 - Factors affecting social behavior
2,166
301 - Sociology & anthropology
1,888
003 - Systems
1,757
330 - Economics
1,692
612 - Human physiology
1,652
305 - Social groups
1,607
551 - Geology, hydrology & meteorology
1,579
650 - Management & auxiliary services
1,480
302 - Social interaction
1,387
615 - Pharmacology & therapeutics
1,364
300 - Social sciences
1,304
570 - Life sciences; biology
1,292
510 - Mathematics
1,287
332 - Financial economics
1,225
577 - Ecology
1,212
660 - Chemical engineering
1,208
670 - Manufacturing
1,190
572 - Biochemistry
1,172
657 - Accounting
1,144
624 - Civil engineering
1,139
327 - International relations
991
512 - Algebra
989
363 - Other social problems & services
966
518 - Numerical analysis
941
579 - Microorganisms, fungi & algae
939
910 - Geography & travel
905
520 - Astronomy & allied sciences
901
614 - Incidence & prevention of disease
890
371 - Schools & their activities; special education
852
361 - Social problems & social welfare in general
825
340 - Law
788
more ...