Classification
629 - Other branches of engineering
348
621 - Applied physics
97
620 - Engineering & allied operations
63
624 - Civil engineering
47
006 - Special computer methods
35
658 - General management
35
333 - Economics of land & energy
30
690 - Buildings
21
004 - Data processing & computer science
16
307 - Communities
16
330 - Economics
16
304 - Factors affecting social behavior
14
600 - Technology
14
691 - Building materials
11
380 - Commerce, communications & transportation
9
005 - Computer programming, programs & data
8
338 - Production
8
670 - Manufacturing
8
700 - The arts; fine & decorative arts
7
720 - Architecture
7
900 - History & geography
7
000 - Computer science, information & general works
6
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
320 - Political science
4
660 - Chemical engineering
4
158 - Applied psychology
3
303 - Social processes
3
363 - Other social problems & services
3
500 - Natural sciences & mathematics
3
696 - Utilities
3
140 - Specific philosophical schools
2
321 - Systems of governments & states
2
340 - Law
2
530 - Physics
2
540 - Chemistry & allied sciences
2
610 - Medicine & health
2
627 - Hydraulic engineering
2
628 - Sanitary & municipal engineering
2
306 - Culture & institutions
1
332 - Financial economics
1
337 - International economics
1
341 - Law of nations
1
345 - Criminal law
1
346 - Private law
1
more ...