Classification
530 - Physics
136
539 - Modern physics
35
621 - Applied physics
22
500 - Natural sciences & mathematics
13
541 - Physical chemistry
11
620 - Engineering & allied operations
9
333 - Economics of land & energy
8
535 - Light & infrared & ultraviolet phenomena
8
700 - The arts; fine & decorative arts
6
501 - Philosophy & theory
5
515 - Analysis
5
537 - Electricity & electronics
5
512 - Algebra
4
520 - Astronomy & allied sciences
4
543 - Analytical chemistry
4
510 - Mathematics
3
000 - Computer science, information & general works
2
523 - Specific celestial bodies & phenomena
2
001 - Knowledge
1
004 - Data processing & computer science
1
006 - Special computer methods
1
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
300 - Social sciences
1
340 - Law
1
380 - Commerce, communications & transportation
1
509 - Historical, geographic & persons treatment
1
519 - Probabilities & applied mathematics
1
531 - Classical mechanics; solid mechanics
1
571 - Physiology & related subjects
1
900 - History & geography
1