Classification
530 - Physics
156
620 - Engineering & allied operations
149
006 - Special computer methods
148
621 - Applied physics
140
005 - Computer programming, programs & data
109
004 - Data processing & computer science
83
515 - Analysis
83
003 - Systems
78
519 - Probabilities & applied mathematics
68
330 - Economics
66
577 - Ecology
53
616 - Diseases
47
541 - Physical chemistry
45
551 - Geology, hydrology & meteorology
43
658 - General management
42
629 - Other branches of engineering
41
300 - Social sciences
39
520 - Astronomy & allied sciences
39
531 - Classical mechanics; solid mechanics
36
001 - Knowledge
35
571 - Physiology & related subjects
33
539 - Modern physics
32
670 - Manufacturing
24
612 - Human physiology
21
040 - [Unassigned]
20
572 - Biochemistry
19
660 - Chemical engineering
18
500 - Natural sciences & mathematics
17
624 - Civil engineering
17
550 - Earth sciences
16
333 - Economics of land & energy
15
338 - Production
15
518 - Numerical analysis
15
523 - Specific celestial bodies & phenomena
15
510 - Mathematics
14
536 - Heat
14
580 - Plants (Botany)
14
543 - Analytical chemistry
11
511 - General principles of mathematics
10
512 - Algebra
10
534 - Sound & related vibrations
10
570 - Life sciences; biology
10
617 - Surgery & related medical specialties
10
332 - Financial economics
9
547 - Organic chemistry
9
610 - Medicine & health
9
548 - Crystallography
8
690 - Buildings
8
910 - Geography & travel
8
516 - Geometry
7
more ...