Classification
530 - Physics
880
539 - Modern physics
183
512 - Algebra
121
333 - Economics of land & energy
43
523 - Specific celestial bodies & phenomena
36
700 - The arts; fine & decorative arts
33
515 - Analysis
25
520 - Astronomy & allied sciences
25
516 - Geometry
24
500 - Natural sciences & mathematics
22
000 - Computer science, information & general works
18
620 - Engineering & allied operations
17
510 - Mathematics
16
537 - Electricity & electronics
13
519 - Probabilities & applied mathematics
12
005 - Computer programming, programs & data
9
511 - General principles of mathematics
9
531 - Classical mechanics; solid mechanics
8
621 - Applied physics
8
535 - Light & infrared & ultraviolet phenomena
7
004 - Data processing & computer science
5
600 - Technology
5
514 - Topology
4
900 - History & geography
4
003 - Systems
3
006 - Special computer methods
3
300 - Social sciences
3
340 - Law
3
380 - Commerce, communications & transportation
3
518 - Numerical analysis
3
536 - Heat
3
540 - Chemistry & allied sciences
3
541 - Physical chemistry
3
547 - Organic chemistry
3
330 - Economics
2
501 - Philosophy & theory
2
538 - Magnetism
2
550 - Earth sciences
2
612 - Human physiology
2
808 - Rhetoric & collections of literature
2
040 - [Unassigned]
1
063 - Organizations in central Europe; in Germany
1
100 - Philosophy & psychology
1
170 - Ethics
1
302 - Social interaction
1
303 - Social processes
1
320 - Political science
1
331 - Labor economics
1
370 - Education
1
400 - Language
1
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