Classification
330 - Economics
6,408
006 - Special computer methods
4,554
620 - Engineering & allied operations
3,434
610 - Medicine & health
2,987
621 - Applied physics
2,866
333 - Economics of land & energy
2,735
320 - Political science
2,710
616 - Diseases
2,447
005 - Computer programming, programs & data
2,111
363 - Other social problems & services
1,954
820 - English & Old English literatures
1,841
004 - Data processing & computer science
1,736
658 - General management
1,719
340 - Law
1,624
500 - Natural sciences & mathematics
1,592
530 - Physics
1,569
900 - History & geography
1,530
551 - Geology, hydrology & meteorology
1,508
300 - Social sciences
1,406
700 - The arts; fine & decorative arts
1,269
600 - Technology
1,153
000 - Computer science, information & general works
1,100
304 - Factors affecting social behavior
1,081
571 - Physiology & related subjects
1,027
577 - Ecology
1,001
370 - Education
896
338 - Production
889
629 - Other branches of engineering
800
630 - Agriculture & related technologies
792
580 - Plants (Botany)
789
519 - Probabilities & applied mathematics
777
570 - Life sciences; biology
746
515 - Analysis
744
100 - Philosophy & psychology
742
230 - Christianity & Christian theology
649
660 - Chemical engineering
621
617 - Surgery & related medical specialties
620
910 - Geography & travel
617
615 - Pharmacology & therapeutics
578
540 - Chemistry & allied sciences
572
140 - Specific philosophical schools
569
306 - Culture & institutions
568
301 - Sociology & anthropology
547
572 - Biochemistry
547
380 - Commerce, communications & transportation
544
170 - Ethics
539
576 - Genetics & evolution
539
612 - Human physiology
539
510 - Mathematics
529
520 - Astronomy & allied sciences
509
more ...