Classification
539 - Modern physics
152
530 - Physics
63
523 - Specific celestial bodies & phenomena
33
621 - Applied physics
18
520 - Astronomy & allied sciences
10
500 - Natural sciences & mathematics
9
537 - Electricity & electronics
8
610 - Medicine & health
8
620 - Engineering & allied operations
5
006 - Special computer methods
2
333 - Economics of land & energy
2
526 - Mathematical geography
2
536 - Heat
2
550 - Earth sciences
2
571 - Physiology & related subjects
2
003 - Systems
1
004 - Data processing & computer science
1
509 - Historical, geographic & persons treatment
1
515 - Analysis
1
518 - Numerical analysis
1
531 - Classical mechanics; solid mechanics
1
535 - Light & infrared & ultraviolet phenomena
1
541 - Physical chemistry
1
548 - Crystallography
1
549 - Mineralogy
1
629 - Other branches of engineering
1
670 - Manufacturing
1
930 - History of ancient world to ca. 499
1