Classification
519 - Probabilities & applied mathematics
626
515 - Analysis
521
510 - Mathematics
426
004 - Data processing & computer science
383
530 - Physics
347
620 - Engineering & allied operations
324
330 - Economics
313
005 - Computer programming, programs & data
281
621 - Applied physics
279
006 - Special computer methods
259
512 - Algebra
249
003 - Systems
164
518 - Numerical analysis
160
658 - General management
151
511 - General principles of mathematics
148
516 - Geometry
138
500 - Natural sciences & mathematics
102
629 - Other branches of engineering
97
300 - Social sciences
94
531 - Classical mechanics; solid mechanics
75
001 - Knowledge
74
332 - Financial economics
67
514 - Topology
58
570 - Life sciences; biology
57
541 - Physical chemistry
54
539 - Modern physics
45
670 - Manufacturing
40
551 - Geology, hydrology & meteorology
38
616 - Diseases
34
520 - Astronomy & allied sciences
30
536 - Heat
30
571 - Physiology & related subjects
29
333 - Economics of land & energy
28
624 - Civil engineering
27
501 - Philosophy & theory
26
610 - Medicine & health
25
331 - Labor economics
23
650 - Management & auxiliary services
23
160 - Logic
21
550 - Earth sciences
21
577 - Ecology
21
320 - Political science
19
523 - Specific celestial bodies & phenomena
18
572 - Biochemistry
18
338 - Production
17
534 - Sound & related vibrations
17
612 - Human physiology
17
363 - Other social problems & services
16
370 - Education
16
384 - Communications; telecommunication
14
more ...