Classification
515 - Analysis
917
006 - Special computer methods
474
620 - Engineering & allied operations
448
530 - Physics
424
003 - Systems
325
519 - Probabilities & applied mathematics
278
629 - Other branches of engineering
278
621 - Applied physics
249
005 - Computer programming, programs & data
142
510 - Mathematics
125
004 - Data processing & computer science
99
330 - Economics
91
531 - Classical mechanics; solid mechanics
82
512 - Algebra
81
040 - [Unassigned]
77
658 - General management
72
511 - General principles of mathematics
66
514 - Topology
64
500 - Natural sciences & mathematics
62
518 - Numerical analysis
57
516 - Geometry
50
570 - Life sciences; biology
47
535 - Light & infrared & ultraviolet phenomena
46
540 - Chemistry & allied sciences
44
000 - Computer science, information & general works
41
536 - Heat
40
700 - The arts; fine & decorative arts
36
300 - Social sciences
34
520 - Astronomy & allied sciences
34
600 - Technology
32
001 - Knowledge
30
333 - Economics of land & energy
29
670 - Manufacturing
25
551 - Geology, hydrology & meteorology
23
571 - Physiology & related subjects
21
523 - Specific celestial bodies & phenomena
19
541 - Physical chemistry
19
612 - Human physiology
17
576 - Genetics & evolution
16
610 - Medicine & health
16
690 - Buildings
16
900 - History & geography
15
534 - Sound & related vibrations
14
624 - Civil engineering
14
577 - Ecology
13
338 - Production
12
550 - Earth sciences
12
539 - Modern physics
11
910 - Geography & travel
10
301 - Sociology & anthropology
9
more ...