Classification
003 - Systems
8
004 - Data processing & computer science
36
005 - Computer programming, programs & data
19
006 - Special computer methods
99
025 - Library operations
3
321 - Systems of governments & states
9
333 - Economics of land & energy
1
338 - Production
1
384 - Communications; telecommunication
2
388 - Transportation; ground transportation
4
515 - Analysis
1
518 - Numerical analysis
1
519 - Probabilities & applied mathematics
6
523 - Specific celestial bodies & phenomena
1
530 - Physics
5
535 - Light & infrared & ultraviolet phenomena
1
537 - Electricity & electronics
2
571 - Physiology & related subjects
1
610 - Medicine & health
10
620 - Engineering & allied operations
21
621 - Applied physics
671
629 - Other branches of engineering
167
658 - General management
11
660 - Chemical engineering
6
670 - Manufacturing
15
780 - Music
1