Classification
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332 - Financial economics
1
333 - Economics of land & energy
5
340 - Law
13
341 - Law of nations
2
342 - Constitutional & administrative law
2
344 - Labor, social, education & cultural law
1
363 - Other social problems & services
2
370 - Education
35
371 - Schools & their activities; special education
8
372 - Elementary education
4
374 - Adult education
11
375 - Curricula
1
378 - Higher education
4
379 - Public policy issues in education
7
380 - Commerce, communications & transportation
3
398 - Folklore
1
400 - Language
101
401 - Philosophy & theory
143
404 - Special topics
11
407 - Education, research & related topics
26
408 - Kinds of persons treatment
1
409 - Geographic & persons treatment
2
410 - Linguistics
102
411 - Writing systems
2
412 - Etymology
2
414 - Phonology & phonetics
8
415 - Grammar
17
417 - Dialectology & historical linguistics
15
418 - Standard usage & applied linguistics
335
420 - English & Old English
9
430 - Germanic languages; German
28
440 - Romance languages; French
1
463 - Spanish dictionaries
1
480 - Hellenic languages; classical Greek
1
490 - Other languages
23
491 - East Indo-European & Celtic languages
2
492 - Afro-Asiatic languages; Semitic languages
1
495 - Languages of East & Southeast Asia
1
499 - Austronesian & other languages
4
500 - Natural sciences & mathematics
3
501 - Philosophy & theory
40
507 - Education, research & related topics
1
509 - Historical, geographic & persons treatment
2
510 - Mathematics
5
511 - General principles of mathematics
3
520 - Astronomy & allied sciences
2
539 - Modern physics
2
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
570 - Life sciences; biology
3
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