Classification
547 - Organic chemistry
148
541 - Physical chemistry
146
620 - Engineering & allied operations
146
621 - Applied physics
79
660 - Chemical engineering
24
546 - Inorganic chemistry
16
530 - Physics
11
577 - Ecology
6
333 - Economics of land & energy
5
572 - Biochemistry
5
628 - Sanitary & municipal engineering
3
629 - Other branches of engineering
3
670 - Manufacturing
3
321 - Systems of governments & states
2
540 - Chemistry & allied sciences
2
543 - Analytical chemistry
2
696 - Utilities
2
720 - Architecture
2
005 - Computer programming, programs & data
1
062 - Organizations in British Isles; in England
1
363 - Other social problems & services
1
537 - Electricity & electronics
1
539 - Modern physics
1
548 - Crystallography
1
610 - Medicine & health
1
615 - Pharmacology & therapeutics
1
624 - Civil engineering
1
641 - Food & drink
1
664 - Food technology
1
667 - Cleaning, color & coating technologies
1