Classification
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333 - Economics of land & energy
55
336 - Public finance
6
338 - Production
6
339 - Macroeconomics & related topics
1
340 - Law
1,293
341 - Law of nations
3
342 - Constitutional & administrative law
2
343 - Military, tax, trade & industrial law
1
346 - Private law
1
350 - Public administration & military science
23
355 - Military science
3
360 - Social problems & services; associations
127
361 - Social problems & social welfare in general
6
362 - Social welfare problems & services
4
363 - Other social problems & services
24
364 - Criminology
3
365 - Penal & related institutions
3
370 - Education
172
379 - Public policy issues in education
1
380 - Commerce, communications & transportation
136
390 - Customs, etiquette & folklore
6
400 - Language
9
410 - Linguistics
1
414 - Phonology & phonetics
1
417 - Dialectology & historical linguistics
1
418 - Standard usage & applied linguistics
1
420 - English & Old English
3
427 - English language variations
1
440 - Romance languages; French
1
500 - Natural sciences & mathematics
11
509 - Historical, geographic & persons treatment
8
510 - Mathematics
1
520 - Astronomy & allied sciences
34
530 - Physics
3
540 - Chemistry & allied sciences
3
543 - Analytical chemistry
1
550 - Earth sciences
12
551 - Geology, hydrology & meteorology
1
554 - Earth sciences of Europe
1
576 - Genetics & evolution
4
580 - Plants (Botany)
7
581 - Specific topics in natural history
3
590 - Animals (Zoology)
1
600 - Technology
19
610 - Medicine & health
56
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
32
624 - Civil engineering
1
630 - Agriculture & related technologies
185
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