Classification
616 - Diseases
5,802
006 - Special computer methods
2,712
005 - Computer programming, programs & data
2,435
621 - Applied physics
2,354
620 - Engineering & allied operations
2,136
530 - Physics
2,107
571 - Physiology & related subjects
1,893
515 - Analysis
1,729
519 - Probabilities & applied mathematics
1,678
300 - Social sciences
1,578
001 - Knowledge
1,442
004 - Data processing & computer science
1,404
572 - Biochemistry
1,233
617 - Surgery & related medical specialties
1,156
610 - Medicine & health
1,072
551 - Geology, hydrology & meteorology
1,069
512 - Algebra
1,057
541 - Physical chemistry
1,043
577 - Ecology
1,010
320 - Political science
993
612 - Human physiology
964
330 - Economics
941
520 - Astronomy & allied sciences
879
003 - Systems
865
658 - General management
850
615 - Pharmacology & therapeutics
797
510 - Mathematics
699
539 - Modern physics
695
333 - Economics of land & energy
665
040 - [Unassigned]
592
580 - Plants (Botany)
566
516 - Geometry
546
629 - Other branches of engineering
520
547 - Organic chemistry
505
500 - Natural sciences & mathematics
503
501 - Philosophy & theory
503
660 - Chemical engineering
486
338 - Production
478
511 - General principles of mathematics
471
531 - Classical mechanics; solid mechanics
471
150 - Psychology
459
618 - Gynecology, obstetrics, pediatrics & geriatrics
427
900 - History & geography
383
570 - Life sciences; biology
382
613 - Personal health & safety
379
518 - Numerical analysis
371
523 - Specific celestial bodies & phenomena
370
301 - Sociology & anthropology
353
327 - International relations
349
514 - Topology
329
more ...