Classification
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150 - Psychology
10
153 - Mental processes & intelligence
10
338 - Production
10
460 - Spanish & Portuguese languages
10
501 - Philosophy & theory
10
650 - Management & auxiliary services
10
910 - Geography & travel
10
363 - Other social problems & services
9
417 - Dialectology & historical linguistics
9
512 - Algebra
9
518 - Numerical analysis
9
576 - Genetics & evolution
9
612 - Human physiology
9
808 - Rhetoric & collections of literature
9
025 - Library operations
8
332 - Financial economics
8
629 - Other branches of engineering
8
720 - Architecture
8
430 - Germanic languages; German
7
480 - Hellenic languages; classical Greek
7
495 - Languages of East & Southeast Asia
7
425 - English grammar
6
439 - Other Germanic languages
6
490 - Other languages
6
307 - Communities
5
304 - Factors affecting social behavior
4
435 - German grammar
4
515 - Analysis
4
616 - Diseases
4
930 - History of ancient world to ca. 499
4
120 - Epistemology, causation & humankind
3
142 - Critical philosophy
3
200 - Religion
3
407 - Education, research & related topics
3
428 - Standard English usage
3
494 - Altaic, Uralic, Hyperborean & Dravidian
3
530 - Physics
3
534 - Sound & related vibrations
3
570 - Life sciences; biology
3
581 - Specific topics in natural history
3
641 - Food & drink
3
686 - Printing & related activities
3
776 - Computer art (Digital art)
3
780 - Music
3
070 - News media, journalism & publishing
2
190 - Modern western philosophy
2
364 - Criminology
2
427 - English language variations
2
492 - Afro-Asiatic languages; Semitic languages
2
551 - Geology, hydrology & meteorology
2
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