Classification
541 - Physical chemistry
380
530 - Physics
95
620 - Engineering & allied operations
43
547 - Organic chemistry
41
546 - Inorganic chemistry
32
539 - Modern physics
28
621 - Applied physics
18
543 - Analytical chemistry
15
003 - Systems
12
518 - Numerical analysis
12
542 - Techniques, equipment & materials
12
540 - Chemistry & allied sciences
11
536 - Heat
9
572 - Biochemistry
9
519 - Probabilities & applied mathematics
8
004 - Data processing & computer science
7
006 - Special computer methods
7
660 - Chemical engineering
7
548 - Crystallography
5
570 - Life sciences; biology
5
531 - Classical mechanics; solid mechanics
4
571 - Physiology & related subjects
4
615 - Pharmacology & therapeutics
4
005 - Computer programming, programs & data
3
538 - Magnetism
3
549 - Mineralogy
3
670 - Manufacturing
3
500 - Natural sciences & mathematics
2
510 - Mathematics
2
511 - General principles of mathematics
2
515 - Analysis
2
535 - Light & infrared & ultraviolet phenomena
2
000 - Computer science, information & general works
1
160 - Logic
1
338 - Production
1
501 - Philosophy & theory
1
507 - Education, research & related topics
1
512 - Algebra
1
514 - Topology
1
537 - Electricity & electronics
1
580 - Plants (Botany)
1
595 - Arthropods
1
632 - Plant injuries, diseases & pests
1
664 - Food technology
1