Classification
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386 - Inland waterway & ferry transportation
1
400 - Language
2
410 - Linguistics
1
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
85
501 - Philosophy & theory
80
507 - Education, research & related topics
6
509 - Historical, geographic & persons treatment
21
510 - Mathematics
63
511 - General principles of mathematics
14
512 - Algebra
63
513 - Arithmetic
1
514 - Topology
14
515 - Analysis
201
516 - Geometry
60
518 - Numerical analysis
20
519 - Probabilities & applied mathematics
90
520 - Astronomy & allied sciences
51
521 - Celestial mechanics
1
523 - Specific celestial bodies & phenomena
60
526 - Mathematical geography
1
529 - Chronology
1
530 - Physics
644
531 - Classical mechanics; solid mechanics
29
532 - Fluid mechanics; liquid mechanics
14
533 - Gas mechanics
3
534 - Sound & related vibrations
10
535 - Light & infrared & ultraviolet phenomena
18
536 - Heat
28
537 - Electricity & electronics
27
538 - Magnetism
10
539 - Modern physics
136
540 - Chemistry & allied sciences
30
541 - Physical chemistry
84
543 - Analytical chemistry
17
546 - Inorganic chemistry
12
547 - Organic chemistry
8
548 - Crystallography
9
549 - Mineralogy
4
550 - Earth sciences
8
551 - Geology, hydrology & meteorology
21
553 - Economic geology
1
570 - Life sciences; biology
20
571 - Physiology & related subjects
52
572 - Biochemistry
22
576 - Genetics & evolution
12
577 - Ecology
4
578 - Natural history of organisms
1
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
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