Classification
006 - Special computer methods
857
620 - Engineering & allied operations
656
690 - Buildings
481
621 - Applied physics
412
670 - Manufacturing
327
005 - Computer programming, programs & data
280
004 - Data processing & computer science
265
629 - Other branches of engineering
180
624 - Civil engineering
158
658 - General management
94
003 - Systems
83
720 - Architecture
80
691 - Building materials
76
040 - [Unassigned]
61
696 - Utilities
44
519 - Probabilities & applied mathematics
40
333 - Economics of land & energy
38
304 - Factors affecting social behavior
33
610 - Medicine & health
29
518 - Numerical analysis
25
628 - Sanitary & municipal engineering
25
025 - Library operations
24
693 - Specific materials & purposes
19
745 - Decorative arts
19
531 - Classical mechanics; solid mechanics
18
660 - Chemical engineering
18
530 - Physics
14
615 - Pharmacology & therapeutics
13
910 - Geography & travel
13
338 - Production
12
515 - Analysis
12
307 - Communities
11
551 - Geology, hydrology & meteorology
10
363 - Other social problems & services
9
371 - Schools & their activities; special education
9
601 - Philosophy & theory
9
570 - Life sciences; biology
8
740 - Drawing & decorative arts
8
794 - Indoor games of skill
8
401 - Philosophy & theory
7
550 - Earth sciences
7
571 - Physiology & related subjects
7
627 - Hydraulic engineering
7
741 - Drawing & drawings
7
306 - Culture & institutions
6
343 - Military, tax, trade & industrial law
6
534 - Sound & related vibrations
6
697 - Heating, ventilating & air-conditioning
6
330 - Economics
5
370 - Education
5
more ...