Library of Congress Classification System

A - General Works

AC	1-199	Collections, Series, Collected Works
	1-195	Collections of Monographs, Essays, etc.
	801-895	Inaugural and Program Dissertations
	901-995	Pamphlet Collections
	999	Scrapbooks
AE	1-90	Encyclopedias (General)
AG	1-600	Dictionaries and Other General Reference Works
	1-90	Dictionaries, Minor Encyclopedias
	103-190	General Works, Pocketbooks, Receipts, etc.
	195-196	Questions and Answers
	240-243	Wonders, Curiosities
	250	Pictorial Works
	305-313	Notes and Queries
	500-551	Clipping Bureaus, Information Bureaus
AI	1-21	Indexes (General)
	21	Indexes to Individual Newspapers
AM	1-501	Museums (General), Collectors and Collecting
	10-101	Museography
	111-160	Museology, Museum Methods, Techniques, etc.
	200-501	Collectors and Collecting, Private Collections
AN		Newspapers
AP	1-271	Periodicals (General)
	101-115	Humorous Periodicals
	200-203	Juvenile Periodicals
AS	1-911	Academies and Learned Societies (General)
AY	10-2001	Yearbooks, Almanacs, Directories (General)
	30-1730	Almanacs
	2001	Directories
AZ	20-999	History of Scholarship and Learning, The Humanities
	999	Popular Errors, Delusions, and Superstitions

AC	Collections, Series, Collected Works.
AE	Encyclopedias (General).
AG	Dictionaries and Other General Reference Works.
AI	Indexes (General).
AM	Museums. Collectors and Collecting.
AN	Newspapers.
AP	Periodicals.
AS	Academies and Learned Societies (General).
AY	Yearbooks. Almanacs. Directories.
AZ	History of Scholarship and Learning. The Humanities.