Classification
620 - Engineering & allied operations
803
006 - Special computer methods
434
621 - Applied physics
296
670 - Manufacturing
214
629 - Other branches of engineering
169
658 - General management
76
003 - Systems
40
531 - Classical mechanics; solid mechanics
34
624 - Civil engineering
30
745 - Decorative arts
30
690 - Buildings
27
005 - Computer programming, programs & data
21
004 - Data processing & computer science
19
610 - Medicine & health
18
660 - Chemical engineering
17
519 - Probabilities & applied mathematics
16
304 - Factors affecting social behavior
13
515 - Analysis
13
600 - Technology
13
333 - Economics of land & energy
11
363 - Other social problems & services
10
530 - Physics
9
330 - Economics
8
000 - Computer science, information & general works
7
500 - Natural sciences & mathematics
7
601 - Philosophy & theory
7
720 - Architecture
6
370 - Education
5
628 - Sanitary & municipal engineering
5
693 - Specific materials & purposes
5
700 - The arts; fine & decorative arts
5
900 - History & geography
5
040 - [Unassigned]
3
320 - Political science
3
510 - Mathematics
3
534 - Sound & related vibrations
3
536 - Heat
3
571 - Physiology & related subjects
3
612 - Human physiology
3
623 - Military & nautical engineering
3
691 - Building materials
3
001 - Knowledge
2
062 - Organizations in British Isles; in England
2
140 - Specific philosophical schools
2
158 - Applied psychology
2
303 - Social processes
2
331 - Labor economics
2
511 - General principles of mathematics
2
520 - Astronomy & allied sciences
2
551 - Geology, hydrology & meteorology
2
more ...