Classification
530 - Physics
852
539 - Modern physics
176
523 - Specific celestial bodies & phenomena
36
333 - Economics of land & energy
35
700 - The arts; fine & decorative arts
27
520 - Astronomy & allied sciences
24
500 - Natural sciences & mathematics
18
620 - Engineering & allied operations
14
537 - Electricity & electronics
13
512 - Algebra
11
516 - Geometry
11
515 - Analysis
10
000 - Computer science, information & general works
8
519 - Probabilities & applied mathematics
8
510 - Mathematics
7
531 - Classical mechanics; solid mechanics
7
535 - Light & infrared & ultraviolet phenomena
6
621 - Applied physics
6
005 - Computer programming, programs & data
4
004 - Data processing & computer science
3
006 - Special computer methods
3
536 - Heat
3
340 - Law
2
380 - Commerce, communications & transportation
2
501 - Philosophy & theory
2
514 - Topology
2
538 - Magnetism
2
541 - Physical chemistry
2
547 - Organic chemistry
2
550 - Earth sciences
2
003 - Systems
1
170 - Ethics
1
330 - Economics
1
400 - Language
1
509 - Historical, geographic & persons treatment
1
518 - Numerical analysis
1
526 - Mathematical geography
1
534 - Sound & related vibrations
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
808 - Rhetoric & collections of literature
1