Classification
616 - Diseases
9,408
620 - Engineering & allied operations
7,966
300 - Social sciences
7,758
650 - Management & auxiliary services
6,718
621 - Applied physics
4,634
001 - Knowledge
4,283
610 - Medicine & health
4,028
658 - General management
3,419
005 - Computer programming, programs & data
3,233
006 - Special computer methods
3,090
530 - Physics
2,948
617 - Surgery & related medical specialties
2,405
519 - Probabilities & applied mathematics
2,201
571 - Physiology & related subjects
2,190
515 - Analysis
2,161
004 - Data processing & computer science
2,153
320 - Political science
1,832
330 - Economics
1,699
510 - Mathematics
1,571
615 - Pharmacology & therapeutics
1,440
572 - Biochemistry
1,421
512 - Algebra
1,331
551 - Geology, hydrology & meteorology
1,300
541 - Physical chemistry
1,236
612 - Human physiology
1,187
003 - Systems
1,161
540 - Chemistry & allied sciences
1,130
577 - Ecology
1,125
570 - Life sciences; biology
1,084
301 - Sociology & anthropology
1,077
670 - Manufacturing
1,065
629 - Other branches of engineering
1,057
333 - Economics of land & energy
1,010
520 - Astronomy & allied sciences
1,005
150 - Psychology
964
340 - Law
956
618 - Gynecology, obstetrics, pediatrics & geriatrics
855
338 - Production
813
539 - Modern physics
798
900 - History & geography
766
624 - Civil engineering
745
516 - Geometry
743
660 - Chemical engineering
743
500 - Natural sciences & mathematics
733
580 - Plants (Botany)
691
547 - Organic chemistry
646
531 - Classical mechanics; solid mechanics
636
040 - [Unassigned]
599
332 - Financial economics
575
550 - Earth sciences
566
more ...