Classification
620 - Engineering & allied operations
1,066
519 - Probabilities & applied mathematics
853
621 - Applied physics
295
629 - Other branches of engineering
220
515 - Analysis
219
006 - Special computer methods
214
003 - Systems
198
530 - Physics
157
518 - Numerical analysis
132
510 - Mathematics
122
004 - Data processing & computer science
117
005 - Computer programming, programs & data
87
531 - Classical mechanics; solid mechanics
70
658 - General management
66
670 - Manufacturing
58
512 - Algebra
48
624 - Civil engineering
35
330 - Economics
32
610 - Medicine & health
28
511 - General principles of mathematics
24
690 - Buildings
23
500 - Natural sciences & mathematics
20
541 - Physical chemistry
18
516 - Geometry
17
550 - Earth sciences
15
660 - Chemical engineering
15
570 - Life sciences; biology
10
551 - Geology, hydrology & meteorology
9
000 - Computer science, information & general works
7
535 - Light & infrared & ultraviolet phenomena
7
333 - Economics of land & energy
6
514 - Topology
5
616 - Diseases
5
300 - Social sciences
4
332 - Financial economics
4
526 - Mathematical geography
4
536 - Heat
4
537 - Electricity & electronics
4
612 - Human physiology
4
910 - Geography & travel
4
001 - Knowledge
3
304 - Factors affecting social behavior
3
370 - Education
3
615 - Pharmacology & therapeutics
3
691 - Building materials
3
338 - Production
2
520 - Astronomy & allied sciences
2
534 - Sound & related vibrations
2
539 - Modern physics
2
543 - Analytical chemistry
2
more ...