Classification
658 - General management
10,755
616 - Diseases
10,570
006 - Special computer methods
10,230
005 - Computer programming, programs & data
9,652
621 - Applied physics
9,142
004 - Data processing & computer science
7,256
620 - Engineering & allied operations
6,344
610 - Medicine & health
3,877
306 - Culture & institutions
3,635
320 - Political science
3,456
617 - Surgery & related medical specialties
3,454
629 - Other branches of engineering
3,168
530 - Physics
2,935
571 - Physiology & related subjects
2,795
519 - Probabilities & applied mathematics
2,726
515 - Analysis
2,533
370 - Education
2,515
338 - Production
2,289
333 - Economics of land & energy
2,226
304 - Factors affecting social behavior
2,220
301 - Sociology & anthropology
1,909
003 - Systems
1,798
330 - Economics
1,698
612 - Human physiology
1,651
305 - Social groups
1,612
551 - Geology, hydrology & meteorology
1,591
650 - Management & auxiliary services
1,480
302 - Social interaction
1,389
615 - Pharmacology & therapeutics
1,366
657 - Accounting
1,307
300 - Social sciences
1,303
570 - Life sciences; biology
1,300
510 - Mathematics
1,297
332 - Financial economics
1,230
660 - Chemical engineering
1,216
577 - Ecology
1,210
670 - Manufacturing
1,200
572 - Biochemistry
1,176
624 - Civil engineering
1,143
327 - International relations
1,012
512 - Algebra
995
363 - Other social problems & services
977
579 - Microorganisms, fungi & algae
944
518 - Numerical analysis
943
910 - Geography & travel
914
520 - Astronomy & allied sciences
903
371 - Schools & their activities; special education
847
614 - Incidence & prevention of disease
829
361 - Social problems & social welfare in general
828
343 - Military, tax, trade & industrial law
825
more ...