Classification
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003 - Systems
1
051 - Serials in American English
1
149 - Other philosophical systems
1
160 - Logic
1
170 - Ethics
1
306 - Culture & institutions
1
307 - Communities
1
310 - Collections of general statistics
1
361 - Social problems & social welfare in general
1
362 - Social welfare problems & services
1
371 - Schools & their activities; special education
1
372 - Elementary education
1
380 - Commerce, communications & transportation
1
417 - Dialectology & historical linguistics
1
507 - Education, research & related topics
1
511 - General principles of mathematics
1
518 - Numerical analysis
1
560 - Paleontology; paleozoology
1
572 - Biochemistry
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
619 - [Unassigned]
1
643 - Housing & household equipment
1
651 - Office services
1
660 - Chemical engineering
1
720 - Architecture
1
777 - [Unassigned]
1
780 - Music
1
781 - General principles & musical forms
1
791 - Public performances
1
800 - Literature & rhetoric
1
900 - History & geography
1