Classification
629 - Other branches of engineering
929
621 - Applied physics
236
620 - Engineering & allied operations
149
003 - Systems
48
670 - Manufacturing
26
658 - General management
21
005 - Computer programming, programs & data
19
004 - Data processing & computer science
14
006 - Special computer methods
14
624 - Civil engineering
11
338 - Production
8
520 - Astronomy & allied sciences
8
333 - Economics of land & energy
7
500 - Natural sciences & mathematics
7
610 - Medicine & health
7
519 - Probabilities & applied mathematics
6
660 - Chemical engineering
6
330 - Economics
4
363 - Other social problems & services
4
515 - Analysis
4
531 - Classical mechanics; solid mechanics
4
667 - Cleaning, color & coating technologies
4
690 - Buildings
4
307 - Communities
3
650 - Management & auxiliary services
3
304 - Factors affecting social behavior
2
530 - Physics
2
550 - Earth sciences
2
150 - Psychology
1
158 - Applied psychology
1
321 - Systems of governments & states
1
337 - International economics
1
342 - Constitutional & administrative law
1
345 - Criminal law
1
362 - Social welfare problems & services
1
374 - Adult education
1
388 - Transportation; ground transportation
1
509 - Historical, geographic & persons treatment
1
518 - Numerical analysis
1
523 - Specific celestial bodies & phenomena
1
534 - Sound & related vibrations
1
541 - Physical chemistry
1
571 - Physiology & related subjects
1
601 - Philosophy & theory
1
607 - Education, research & related topics
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
625 - Engineering of railroads & roads
1
691 - Building materials
1
710 - Civic & landscape art
1