Classification
541 - Physical chemistry
354
530 - Physics
80
620 - Engineering & allied operations
41
547 - Organic chemistry
40
546 - Inorganic chemistry
30
539 - Modern physics
23
003 - Systems
14
543 - Analytical chemistry
14
542 - Techniques, equipment & materials
12
518 - Numerical analysis
11
540 - Chemistry & allied sciences
10
572 - Biochemistry
9
621 - Applied physics
8
006 - Special computer methods
7
519 - Probabilities & applied mathematics
7
004 - Data processing & computer science
6
660 - Chemical engineering
6
548 - Crystallography
5
536 - Heat
4
570 - Life sciences; biology
4
571 - Physiology & related subjects
4
615 - Pharmacology & therapeutics
4
531 - Classical mechanics; solid mechanics
3
538 - Magnetism
3
670 - Manufacturing
3
500 - Natural sciences & mathematics
2
511 - General principles of mathematics
2
515 - Analysis
2
535 - Light & infrared & ultraviolet phenomena
2
549 - Mineralogy
2
000 - Computer science, information & general works
1
005 - Computer programming, programs & data
1
160 - Logic
1
304 - Factors affecting social behavior
1
501 - Philosophy & theory
1
507 - Education, research & related topics
1
510 - Mathematics
1
512 - Algebra
1
514 - Topology
1
537 - Electricity & electronics
1
580 - Plants (Botany)
1
592 - Invertebrates
1
632 - Plant injuries, diseases & pests
1
664 - Food technology
1