Classification
616 - Diseases
9,981
620 - Engineering & allied operations
8,092
300 - Social sciences
7,758
650 - Management & auxiliary services
6,698
621 - Applied physics
4,864
001 - Knowledge
4,255
610 - Medicine & health
4,032
658 - General management
3,463
005 - Computer programming, programs & data
3,300
530 - Physics
2,926
004 - Data processing & computer science
2,883
617 - Surgery & related medical specialties
2,437
571 - Physiology & related subjects
2,204
519 - Probabilities & applied mathematics
2,199
515 - Analysis
2,169
006 - Special computer methods
2,095
320 - Political science
1,830
330 - Economics
1,758
510 - Mathematics
1,575
615 - Pharmacology & therapeutics
1,444
572 - Biochemistry
1,421
512 - Algebra
1,331
551 - Geology, hydrology & meteorology
1,300
541 - Physical chemistry
1,236
612 - Human physiology
1,190
540 - Chemistry & allied sciences
1,130
577 - Ecology
1,124
629 - Other branches of engineering
1,123
570 - Life sciences; biology
1,105
301 - Sociology & anthropology
1,076
670 - Manufacturing
1,068
333 - Economics of land & energy
1,063
003 - Systems
1,035
520 - Astronomy & allied sciences
1,003
150 - Psychology
968
340 - Law
956
618 - Gynecology, obstetrics, pediatrics & geriatrics
855
338 - Production
823
539 - Modern physics
798
900 - History & geography
766
500 - Natural sciences & mathematics
752
660 - Chemical engineering
745
624 - Civil engineering
744
516 - Geometry
743
580 - Plants (Botany)
691
547 - Organic chemistry
646
531 - Classical mechanics; solid mechanics
636
332 - Financial economics
575
550 - Earth sciences
565
613 - Personal health & safety
559
more ...