Classification
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360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
3
362 - Social welfare problems & services
3
363 - Other social problems & services
26
370 - Education
12
371 - Schools & their activities; special education
5
374 - Adult education
2
380 - Commerce, communications & transportation
17
381 - Commerce
1
384 - Communications; telecommunication
6
400 - Language
7
401 - Philosophy & theory
4
410 - Linguistics
3
414 - Phonology & phonetics
3
418 - Standard usage & applied linguistics
1
500 - Natural sciences & mathematics
58
501 - Philosophy & theory
153
507 - Education, research & related topics
3
509 - Historical, geographic & persons treatment
21
510 - Mathematics
101
511 - General principles of mathematics
509
512 - Algebra
57
513 - Arithmetic
3
514 - Topology
10
515 - Analysis
36
516 - Geometry
11
518 - Numerical analysis
49
519 - Probabilities & applied mathematics
22
520 - Astronomy & allied sciences
70
523 - Specific celestial bodies & phenomena
14
526 - Mathematical geography
4
530 - Physics
246
531 - Classical mechanics; solid mechanics
14
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
534 - Sound & related vibrations
1
535 - Light & infrared & ultraviolet phenomena
4
536 - Heat
3
537 - Electricity & electronics
5
539 - Modern physics
13
540 - Chemistry & allied sciences
12
541 - Physical chemistry
8
543 - Analytical chemistry
1
546 - Inorganic chemistry
1
549 - Mineralogy
1
550 - Earth sciences
7
551 - Geology, hydrology & meteorology
38
553 - Economic geology
1
570 - Life sciences; biology
8
576 - Genetics & evolution
11
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