Classification
690 - Buildings
707
624 - Civil engineering
179
620 - Engineering & allied operations
111
691 - Building materials
79
720 - Architecture
70
621 - Applied physics
45
696 - Utilities
38
658 - General management
28
693 - Specific materials & purposes
24
333 - Economics of land & energy
23
628 - Sanitary & municipal engineering
22
629 - Other branches of engineering
21
531 - Classical mechanics; solid mechanics
13
304 - Factors affecting social behavior
12
745 - Decorative arts
11
670 - Manufacturing
9
697 - Heating, ventilating & air-conditioning
9
519 - Probabilities & applied mathematics
8
551 - Geology, hydrology & meteorology
8
307 - Communities
7
363 - Other social problems & services
7
006 - Special computer methods
6
534 - Sound & related vibrations
6
660 - Chemical engineering
6
352 - General considerations of public administration
5
627 - Hydraulic engineering
5
910 - Geography & travel
5
003 - Systems
4
338 - Production
4
610 - Medicine & health
4
725 - Public structures
4
550 - Earth sciences
3
820 - English & Old English literatures
3
005 - Computer programming, programs & data
2
320 - Political science
2
343 - Military, tax, trade & industrial law
2
657 - Accounting
2
001 - Knowledge
1
004 - Data processing & computer science
1
364 - Criminology
1
370 - Education
1
500 - Natural sciences & mathematics
1
516 - Geometry
1
520 - Astronomy & allied sciences
1
530 - Physics
1
540 - Chemistry & allied sciences
1
570 - Life sciences; biology
1
571 - Physiology & related subjects
1
613 - Personal health & safety
1
650 - Management & auxiliary services
1
more ...