Classification
530 - Physics
708
539 - Modern physics
172
523 - Specific celestial bodies & phenomena
34
520 - Astronomy & allied sciences
24
500 - Natural sciences & mathematics
17
537 - Electricity & electronics
14
620 - Engineering & allied operations
14
540 - Chemistry & allied sciences
12
512 - Algebra
9
516 - Geometry
9
515 - Analysis
8
531 - Classical mechanics; solid mechanics
8
519 - Probabilities & applied mathematics
7
005 - Computer programming, programs & data
6
621 - Applied physics
6
510 - Mathematics
5
535 - Light & infrared & ultraviolet phenomena
5
541 - Physical chemistry
4
547 - Organic chemistry
4
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
536 - Heat
3
000 - Computer science, information & general works
2
004 - Data processing & computer science
2
006 - Special computer methods
2
501 - Philosophy & theory
2
514 - Topology
2
538 - Magnetism
2
550 - Earth sciences
2
003 - Systems
1
063 - Organizations in central Europe; in Germany
1
170 - Ethics
1
340 - Law
1
400 - Language
1
509 - Historical, geographic & persons treatment
1
518 - Numerical analysis
1
526 - Mathematical geography
1
534 - Sound & related vibrations
1
549 - Mineralogy
1
660 - Chemical engineering
1
667 - Cleaning, color & coating technologies
1
668 - Technology of other organic products
1
808 - Rhetoric & collections of literature
1