Classification
616 - Diseases
9,950
620 - Engineering & allied operations
8,018
300 - Social sciences
7,470
650 - Management & auxiliary services
6,725
621 - Applied physics
4,843
610 - Medicine & health
4,021
001 - Knowledge
3,971
658 - General management
3,453
005 - Computer programming, programs & data
3,231
530 - Physics
2,960
004 - Data processing & computer science
2,949
617 - Surgery & related medical specialties
2,435
519 - Probabilities & applied mathematics
2,223
515 - Analysis
2,168
006 - Special computer methods
2,137
571 - Physiology & related subjects
2,075
320 - Political science
1,832
330 - Economics
1,753
510 - Mathematics
1,570
615 - Pharmacology & therapeutics
1,444
572 - Biochemistry
1,436
512 - Algebra
1,331
551 - Geology, hydrology & meteorology
1,300
541 - Physical chemistry
1,242
612 - Human physiology
1,171
540 - Chemistry & allied sciences
1,133
629 - Other branches of engineering
1,116
577 - Ecology
1,110
570 - Life sciences; biology
1,100
301 - Sociology & anthropology
1,073
670 - Manufacturing
1,050
333 - Economics of land & energy
1,043
003 - Systems
1,023
520 - Astronomy & allied sciences
1,008
150 - Psychology
968
340 - Law
956
618 - Gynecology, obstetrics, pediatrics & geriatrics
855
338 - Production
846
539 - Modern physics
805
500 - Natural sciences & mathematics
803
900 - History & geography
766
624 - Civil engineering
747
660 - Chemical engineering
745
516 - Geometry
742
580 - Plants (Botany)
690
531 - Classical mechanics; solid mechanics
646
547 - Organic chemistry
646
332 - Financial economics
575
550 - Earth sciences
571
614 - Incidence & prevention of disease
559
more ...