Classification
330 - Economics
6,333
004 - Data processing & computer science
5,536
005 - Computer programming, programs & data
5,025
006 - Special computer methods
4,692
658 - General management
4,583
530 - Physics
4,511
519 - Probabilities & applied mathematics
4,242
620 - Engineering & allied operations
4,199
515 - Analysis
4,080
621 - Applied physics
3,875
320 - Political science
3,533
300 - Social sciences
3,387
512 - Algebra
2,574
003 - Systems
2,436
500 - Natural sciences & mathematics
2,183
510 - Mathematics
2,102
629 - Other branches of engineering
2,077
340 - Law
2,044
900 - History & geography
1,877
100 - Philosophy & psychology
1,602
370 - Education
1,502
610 - Medicine & health
1,355
700 - The arts; fine & decorative arts
1,329
338 - Production
1,301
511 - General principles of mathematics
1,301
301 - Sociology & anthropology
1,286
333 - Economics of land & energy
1,268
600 - Technology
1,231
616 - Diseases
1,144
306 - Culture & institutions
1,124
650 - Management & auxiliary services
1,088
516 - Geometry
1,018
000 - Computer science, information & general works
975
539 - Modern physics
863
302 - Social interaction
860
331 - Labor economics
813
541 - Physical chemistry
809
332 - Financial economics
782
518 - Numerical analysis
782
304 - Factors affecting social behavior
730
570 - Life sciences; biology
673
531 - Classical mechanics; solid mechanics
605
501 - Philosophy & theory
595
001 - Knowledge
590
520 - Astronomy & allied sciences
589
514 - Topology
587
363 - Other social problems & services
580
150 - Psychology
562
380 - Commerce, communications & transportation
561
305 - Social groups
557
more ...