Classification
621 - Applied physics
152
620 - Engineering & allied operations
60
006 - Special computer methods
54
541 - Physical chemistry
26
333 - Economics of land & energy
12
321 - Systems of governments & states
9
629 - Other branches of engineering
9
660 - Chemical engineering
7
530 - Physics
4
062 - Organizations in British Isles; in England
3
338 - Production
3
670 - Manufacturing
3
697 - Heating, ventilating & air-conditioning
3
003 - Systems
2
546 - Inorganic chemistry
2
547 - Organic chemistry
2
624 - Civil engineering
2
532 - Fluid mechanics; liquid mechanics
1
535 - Light & infrared & ultraviolet phenomena
1
536 - Heat
1
539 - Modern physics
1
542 - Techniques, equipment & materials
1
549 - Mineralogy
1
551 - Geology, hydrology & meteorology
1
658 - General management
1
691 - Building materials
1
910 - Geography & travel
1