Classification
620 - Engineering & allied operations
552
621 - Applied physics
447
530 - Physics
196
537 - Electricity & electronics
83
541 - Physical chemistry
48
535 - Light & infrared & ultraviolet phenomena
22
538 - Magnetism
17
539 - Modern physics
16
543 - Analytical chemistry
16
500 - Natural sciences & mathematics
12
546 - Inorganic chemistry
11
547 - Organic chemistry
11
670 - Manufacturing
11
333 - Economics of land & energy
7
660 - Chemical engineering
7
548 - Crystallography
6
629 - Other branches of engineering
6
004 - Data processing & computer science
5
610 - Medicine & health
5
000 - Computer science, information & general works
3
515 - Analysis
3
531 - Classical mechanics; solid mechanics
3
540 - Chemistry & allied sciences
3
700 - The arts; fine & decorative arts
3
003 - Systems
2
005 - Computer programming, programs & data
2
338 - Production
2
519 - Probabilities & applied mathematics
2
536 - Heat
2
571 - Physiology & related subjects
2
006 - Special computer methods
1
380 - Commerce, communications & transportation
1
389 - Metrology & standardization
1
518 - Numerical analysis
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
577 - Ecology
1
580 - Plants (Botany)
1
600 - Technology
1
617 - Surgery & related medical specialties
1
630 - Agriculture & related technologies
1
667 - Cleaning, color & coating technologies
1
668 - Technology of other organic products
1
681 - Precision instruments & other devices
1
745 - Decorative arts
1