Classification
515 - Analysis
367
620 - Engineering & allied operations
87
530 - Physics
79
519 - Probabilities & applied mathematics
60
518 - Numerical analysis
59
621 - Applied physics
43
510 - Mathematics
40
531 - Classical mechanics; solid mechanics
34
500 - Natural sciences & mathematics
31
001 - Knowledge
24
003 - Systems
24
300 - Social sciences
24
000 - Computer science, information & general works
21
006 - Special computer methods
18
539 - Modern physics
17
512 - Algebra
16
700 - The arts; fine & decorative arts
16
004 - Data processing & computer science
14
537 - Electricity & electronics
14
600 - Technology
9
629 - Other branches of engineering
9
005 - Computer programming, programs & data
7
330 - Economics
7
511 - General principles of mathematics
7
516 - Geometry
7
551 - Geology, hydrology & meteorology
7
040 - [Unassigned]
6
340 - Law
6
541 - Physical chemistry
6
550 - Earth sciences
5
660 - Chemical engineering
4
900 - History & geography
4
304 - Factors affecting social behavior
3
333 - Economics of land & energy
3
514 - Topology
3
526 - Mathematical geography
3
570 - Life sciences; biology
3
576 - Genetics & evolution
3
610 - Medicine & health
3
800 - Literature & rhetoric
3
363 - Other social problems & services
2
501 - Philosophy & theory
2
523 - Specific celestial bodies & phenomena
2
534 - Sound & related vibrations
2
535 - Light & infrared & ultraviolet phenomena
2
536 - Heat
2
548 - Crystallography
2
577 - Ecology
2
612 - Human physiology
2
615 - Pharmacology & therapeutics
2
more ...