Classification
621 - Applied physics
690
629 - Other branches of engineering
172
006 - Special computer methods
102
004 - Data processing & computer science
39
003 - Systems
33
620 - Engineering & allied operations
23
005 - Computer programming, programs & data
17
670 - Manufacturing
15
610 - Medicine & health
10
321 - Systems of governments & states
9
658 - General management
8
660 - Chemical engineering
6
530 - Physics
5
333 - Economics of land & energy
4
025 - Library operations
3
515 - Analysis
3
518 - Numerical analysis
2
537 - Electricity & electronics
2
523 - Specific celestial bodies & phenomena
1
535 - Light & infrared & ultraviolet phenomena
1
571 - Physiology & related subjects
1
780 - Music
1