Classification
616 - Diseases
9,679
620 - Engineering & allied operations
8,017
300 - Social sciences
7,759
650 - Management & auxiliary services
6,700
621 - Applied physics
4,740
001 - Knowledge
4,270
610 - Medicine & health
4,030
658 - General management
3,444
005 - Computer programming, programs & data
3,281
530 - Physics
2,946
006 - Special computer methods
2,638
004 - Data processing & computer science
2,526
617 - Surgery & related medical specialties
2,416
571 - Physiology & related subjects
2,202
519 - Probabilities & applied mathematics
2,198
515 - Analysis
2,161
320 - Political science
1,832
330 - Economics
1,726
510 - Mathematics
1,574
615 - Pharmacology & therapeutics
1,439
572 - Biochemistry
1,421
512 - Algebra
1,331
551 - Geology, hydrology & meteorology
1,300
541 - Physical chemistry
1,236
612 - Human physiology
1,189
540 - Chemistry & allied sciences
1,130
577 - Ecology
1,124
003 - Systems
1,096
570 - Life sciences; biology
1,094
629 - Other branches of engineering
1,087
301 - Sociology & anthropology
1,076
670 - Manufacturing
1,067
333 - Economics of land & energy
1,035
520 - Astronomy & allied sciences
1,003
150 - Psychology
967
340 - Law
956
618 - Gynecology, obstetrics, pediatrics & geriatrics
855
338 - Production
818
539 - Modern physics
798
900 - History & geography
766
624 - Civil engineering
745
660 - Chemical engineering
744
516 - Geometry
743
500 - Natural sciences & mathematics
732
580 - Plants (Botany)
691
547 - Organic chemistry
646
531 - Classical mechanics; solid mechanics
637
332 - Financial economics
575
550 - Earth sciences
566
613 - Personal health & safety
558
more ...