Classification
510 - Mathematics
1,838
519 - Probabilities & applied mathematics
702
515 - Analysis
536
330 - Economics
314
530 - Physics
280
620 - Engineering & allied operations
258
512 - Algebra
187
004 - Data processing & computer science
179
516 - Geometry
140
621 - Applied physics
140
005 - Computer programming, programs & data
137
511 - General principles of mathematics
117
518 - Numerical analysis
102
658 - General management
97
300 - Social sciences
88
370 - Education
84
003 - Systems
65
001 - Knowledge
57
500 - Natural sciences & mathematics
56
006 - Special computer methods
52
650 - Management & auxiliary services
48
570 - Life sciences; biology
43
629 - Other branches of engineering
41
531 - Classical mechanics; solid mechanics
40
541 - Physical chemistry
37
514 - Topology
27
610 - Medicine & health
25
320 - Political science
23
332 - Financial economics
23
368 - Insurance
19
624 - Civil engineering
18
536 - Heat
16
537 - Electricity & electronics
16
670 - Manufacturing
13
808 - Rhetoric & collections of literature
12
150 - Psychology
11
040 - [Unassigned]
10
657 - Accounting
10
333 - Economics of land & energy
9
338 - Production
9
540 - Chemistry & allied sciences
9
336 - Public finance
8
520 - Astronomy & allied sciences
7
612 - Human physiology
7
100 - Philosophy & psychology
6
371 - Schools & their activities; special education
6
535 - Light & infrared & ultraviolet phenomena
6
539 - Modern physics
6
616 - Diseases
6
690 - Buildings
6
more ...