Classification
621 - Applied physics
181
620 - Engineering & allied operations
66
530 - Physics
41
006 - Special computer methods
39
004 - Data processing & computer science
22
001 - Knowledge
20
300 - Social sciences
20
537 - Electricity & electronics
13
003 - Systems
6
005 - Computer programming, programs & data
6
541 - Physical chemistry
5
500 - Natural sciences & mathematics
4
543 - Analytical chemistry
4
548 - Crystallography
4
040 - [Unassigned]
3
062 - Organizations in British Isles; in England
3
629 - Other branches of engineering
3
670 - Manufacturing
3
370 - Education
2
520 - Astronomy & allied sciences
2
539 - Modern physics
2
660 - Chemical engineering
2
025 - Library operations
1
509 - Historical, geographic & persons treatment
1
510 - Mathematics
1
515 - Analysis
1
519 - Probabilities & applied mathematics
1
523 - Specific celestial bodies & phenomena
1
531 - Classical mechanics; solid mechanics
1
536 - Heat
1
538 - Magnetism
1
571 - Physiology & related subjects
1
572 - Biochemistry
1
610 - Medicine & health
1
612 - Human physiology
1
658 - General management
1