Classification
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345 - Criminal law
2
350 - Public administration & military science
4
352 - General considerations of public administration
3
353 - Specific fields of public administration
1
355 - Military science
10
358 - Air & other specialized forces
2
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
6
362 - Social welfare problems & services
10
363 - Other social problems & services
251
364 - Criminology
136
368 - Insurance
34
370 - Education
114
371 - Schools & their activities; special education
129
372 - Elementary education
5
373 - Secondary education
1
374 - Adult education
240
375 - Curricula
1
378 - Higher education
9
379 - Public policy issues in education
8
380 - Commerce, communications & transportation
208
381 - Commerce
34
382 - International commerce
1
384 - Communications; telecommunication
154
388 - Transportation; ground transportation
1
389 - Metrology & standardization
1
390 - Customs, etiquette & folklore
1
394 - General customs
1
400 - Language
30
410 - Linguistics
23
414 - Phonology & phonetics
31
418 - Standard usage & applied linguistics
8
428 - Standard English usage
1
500 - Natural sciences & mathematics
337
502 - Miscellany
1
507 - Education, research & related topics
12
508 - Natural history
1
509 - Historical, geographic & persons treatment
1
510 - Mathematics
36
511 - General principles of mathematics
10
512 - Algebra
10
514 - Topology
9
515 - Analysis
184
516 - Geometry
11
518 - Numerical analysis
2
519 - Probabilities & applied mathematics
94
520 - Astronomy & allied sciences
46
523 - Specific celestial bodies & phenomena
16
526 - Mathematical geography
2
529 - Chronology
2
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