Classification
616 - Diseases
9,964
620 - Engineering & allied operations
7,956
650 - Management & auxiliary services
6,747
300 - Social sciences
6,368
621 - Applied physics
4,835
610 - Medicine & health
4,028
658 - General management
3,489
005 - Computer programming, programs & data
3,223
530 - Physics
2,993
004 - Data processing & computer science
2,965
001 - Knowledge
2,872
617 - Surgery & related medical specialties
2,438
519 - Probabilities & applied mathematics
2,233
515 - Analysis
2,168
006 - Special computer methods
2,095
571 - Physiology & related subjects
2,014
320 - Political science
1,832
330 - Economics
1,747
500 - Natural sciences & mathematics
1,580
510 - Mathematics
1,566
572 - Biochemistry
1,450
615 - Pharmacology & therapeutics
1,447
512 - Algebra
1,331
551 - Geology, hydrology & meteorology
1,282
541 - Physical chemistry
1,245
612 - Human physiology
1,175
540 - Chemistry & allied sciences
1,134
629 - Other branches of engineering
1,116
577 - Ecology
1,107
570 - Life sciences; biology
1,097
301 - Sociology & anthropology
1,085
670 - Manufacturing
1,045
333 - Economics of land & energy
1,021
003 - Systems
1,013
520 - Astronomy & allied sciences
1,009
150 - Psychology
968
340 - Law
956
338 - Production
867
618 - Gynecology, obstetrics, pediatrics & geriatrics
854
539 - Modern physics
810
900 - History & geography
766
624 - Civil engineering
753
660 - Chemical engineering
745
516 - Geometry
742
580 - Plants (Botany)
690
531 - Classical mechanics; solid mechanics
673
547 - Organic chemistry
646
050 - General serial publications
596
332 - Financial economics
575
550 - Earth sciences
575
more ...