Classification
629 - Other branches of engineering
348
621 - Applied physics
97
624 - Civil engineering
47
620 - Engineering & allied operations
36
006 - Special computer methods
35
658 - General management
33
333 - Economics of land & energy
21
690 - Buildings
21
004 - Data processing & computer science
16
307 - Communities
16
304 - Factors affecting social behavior
14
330 - Economics
11
691 - Building materials
11
005 - Computer programming, programs & data
8
338 - Production
8
670 - Manufacturing
8
720 - Architecture
7
003 - Systems
6
388 - Transportation; ground transportation
6
625 - Engineering of railroads & roads
6
910 - Geography & travel
6
515 - Analysis
5
519 - Probabilities & applied mathematics
5
623 - Military & nautical engineering
5
660 - Chemical engineering
4
158 - Applied psychology
3
303 - Social processes
3
696 - Utilities
3
321 - Systems of governments & states
2
627 - Hydraulic engineering
2
628 - Sanitary & municipal engineering
2
306 - Culture & institutions
1
332 - Financial economics
1
337 - International economics
1
340 - Law
1
341 - Law of nations
1
345 - Criminal law
1
346 - Private law
1
352 - General considerations of public administration
1
370 - Education
1
381 - Commerce
1
384 - Communications; telecommunication
1
407 - Education, research & related topics
1
518 - Numerical analysis
1
530 - Physics
1
531 - Classical mechanics; solid mechanics
1
537 - Electricity & electronics
1
577 - Ecology
1
601 - Philosophy & theory
1
610 - Medicine & health
1
more ...