Classification
003 - Systems
1,295
629 - Other branches of engineering
970
006 - Special computer methods
706
530 - Physics
679
621 - Applied physics
366
515 - Analysis
321
620 - Engineering & allied operations
253
519 - Probabilities & applied mathematics
247
536 - Heat
104
658 - General management
80
004 - Data processing & computer science
70
511 - General principles of mathematics
53
500 - Natural sciences & mathematics
48
330 - Economics
47
300 - Social sciences
35
005 - Computer programming, programs & data
34
333 - Economics of land & energy
32
670 - Manufacturing
32
518 - Numerical analysis
30
535 - Light & infrared & ultraviolet phenomena
28
531 - Classical mechanics; solid mechanics
26
512 - Algebra
24
570 - Life sciences; biology
24
301 - Sociology & anthropology
23
571 - Physiology & related subjects
23
610 - Medicine & health
22
551 - Geology, hydrology & meteorology
20
510 - Mathematics
19
539 - Modern physics
18
040 - [Unassigned]
17
523 - Specific celestial bodies & phenomena
17
541 - Physical chemistry
17
320 - Political science
16
370 - Education
16
100 - Philosophy & psychology
15
516 - Geometry
15
700 - The arts; fine & decorative arts
14
550 - Earth sciences
13
600 - Technology
13
000 - Computer science, information & general works
12
624 - Civil engineering
12
900 - History & geography
12
520 - Astronomy & allied sciences
11
321 - Systems of governments & states
10
304 - Factors affecting social behavior
9
612 - Human physiology
9
338 - Production
8
576 - Genetics & evolution
8
660 - Chemical engineering
8
910 - Geography & travel
8
more ...