Classification
629 - Other branches of engineering
1,206
003 - Systems
1,065
621 - Applied physics
262
006 - Special computer methods
103
620 - Engineering & allied operations
66
515 - Analysis
39
519 - Probabilities & applied mathematics
27
004 - Data processing & computer science
25
670 - Manufacturing
17
658 - General management
13
530 - Physics
10
321 - Systems of governments & states
9
333 - Economics of land & energy
8
610 - Medicine & health
8
660 - Chemical engineering
5
511 - General principles of mathematics
4
531 - Classical mechanics; solid mechanics
4
624 - Civil engineering
4
005 - Computer programming, programs & data
3
512 - Algebra
3
516 - Geometry
2
523 - Specific celestial bodies & phenomena
2
630 - Agriculture & related technologies
2
690 - Buildings
2
158 - Applied psychology
1
339 - Macroeconomics & related topics
1
370 - Education
1
500 - Natural sciences & mathematics
1
518 - Numerical analysis
1
535 - Light & infrared & ultraviolet phenomena
1
536 - Heat
1
537 - Electricity & electronics
1
543 - Analytical chemistry
1
570 - Life sciences; biology
1
616 - Diseases
1
627 - Hydraulic engineering
1
628 - Sanitary & municipal engineering
1
696 - Utilities
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1
910 - Geography & travel
1