Classification
530 - Physics
179
620 - Engineering & allied operations
126
531 - Classical mechanics; solid mechanics
84
621 - Applied physics
60
515 - Analysis
35
539 - Modern physics
27
519 - Probabilities & applied mathematics
24
551 - Geology, hydrology & meteorology
21
629 - Other branches of engineering
15
550 - Earth sciences
13
518 - Numerical analysis
11
003 - Systems
9
536 - Heat
9
523 - Specific celestial bodies & phenomena
7
541 - Physical chemistry
7
520 - Astronomy & allied sciences
6
624 - Civil engineering
6
660 - Chemical engineering
6
333 - Economics of land & energy
5
500 - Natural sciences & mathematics
5
534 - Sound & related vibrations
3
535 - Light & infrared & ultraviolet phenomena
3
004 - Data processing & computer science
2
510 - Mathematics
2
516 - Geometry
2
526 - Mathematical geography
2
543 - Analytical chemistry
2
610 - Medicine & health
2
616 - Diseases
2
910 - Geography & travel
2
005 - Computer programming, programs & data
1
006 - Special computer methods
1
370 - Education
1
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
571 - Physiology & related subjects
1
600 - Technology
1
641 - Food & drink
1
650 - Management & auxiliary services
1
664 - Food technology
1
690 - Buildings
1