Classification
006 - Special computer methods
14,104
658 - General management
10,470
005 - Computer programming, programs & data
10,144
616 - Diseases
9,719
621 - Applied physics
7,977
620 - Engineering & allied operations
5,808
004 - Data processing & computer science
5,637
610 - Medicine & health
3,805
306 - Culture & institutions
3,605
320 - Political science
3,475
617 - Surgery & related medical specialties
3,309
530 - Physics
2,938
571 - Physiology & related subjects
2,872
629 - Other branches of engineering
2,772
519 - Probabilities & applied mathematics
2,700
370 - Education
2,572
515 - Analysis
2,524
003 - Systems
2,505
304 - Factors affecting social behavior
2,277
338 - Production
2,207
333 - Economics of land & energy
2,179
301 - Sociology & anthropology
1,942
305 - Social groups
1,627
551 - Geology, hydrology & meteorology
1,604
612 - Human physiology
1,588
330 - Economics
1,573
650 - Management & auxiliary services
1,456
040 - [Unassigned]
1,381
302 - Social interaction
1,381
615 - Pharmacology & therapeutics
1,332
657 - Accounting
1,318
510 - Mathematics
1,304
300 - Social sciences
1,269
332 - Financial economics
1,223
660 - Chemical engineering
1,223
670 - Manufacturing
1,213
570 - Life sciences; biology
1,205
577 - Ecology
1,202
572 - Biochemistry
1,182
624 - Civil engineering
1,143
327 - International relations
1,035
512 - Algebra
1,003
579 - Microorganisms, fungi & algae
957
518 - Numerical analysis
945
910 - Geography & travel
933
363 - Other social problems & services
901
520 - Astronomy & allied sciences
896
371 - Schools & their activities; special education
857
343 - Military, tax, trade & industrial law
833
361 - Social problems & social welfare in general
818
more ...