Library of Congress Classification Outline – Class Z




Subclass Z


Z4‑115.5 Books (General). Writing. Paleography

Z4‑8 History of books and bookmaking

Z40‑104.5 Writing

Z41‑42.5 Autographs. Signatures

Z43‑45 Calligraphy. Penmanship

Z48 Duplicating processes. Copying services

Including mimeographing, multilithing

Z49‑51.5 Typewriters. Typewriting. Keyboards. Keyboarding

Z52‑52.5 Word processing

Z53‑102 Shorthand. Stenography. Phonography

Z102.5‑104.5 Cryptography. Ciphers. Invisible writing

Z105‑115.5 Manuscripts. Paleography

Z116‑659 Book industries and trade

Z116.A2 Treatises on the modern printed book

Z116.A3 Book design

Z116.A5‑265.5 Printing

Z124‑228 History

Z231‑234 Printers and printing establishments

Z234 Medallic history of printing. Tokens

Z235‑236 Printer’s marks, mottoes, etc.

Z237 Paper. Watermarks, etc.

Z240‑241.5 Incunabula. Block books

Including broadsides, playing cards

Z242.9‑264.5 Practical printing

Including printing as a business, layout, paper and ink,

machinery, type and type founding, electrotyping,

desktop publishing, typesetting, presswork

Z265‑265.5 Representation or reproduction of books, documents,

etc., by photography, microphotography, or other


Z266‑276 Bookbinding. Book decoration

Z278‑549 Bookselling and publishing

Z551‑656 Copyright

Z657‑659 Freedom of the press. Censorship

Z662‑1000.5 Libraries

Z662‑664 Collections

Z665‑718.8 Library science. Information science

Z668‑669.7 Library education. Research

Z672‑Z672.13 Library cooperation and coordination

Z674.7‑674.83 Library information networks

Z675 Classes of libraries

Z678‑678.88 Library administration and organization. Constitution

Z678.89‑678.892 Library service agencies


Z678.9‑Z678.93 Automation

Z679‑680 Library buildings. Library architecture

Including planning, space utilization, security, safety,

lighting, etc.

Z680.3‑680.6 Library communication systems

Z681‑681.3 Reproduction of library materials. Storage media of

library materials

Z681.5‑681.7 Trustees. Library boards, committees, etc.

Z682‑682.4 Personnel

Z683‑683.5 Finance. Insurance

Z684‑685 Supplies. Shelving. Bookstacks

Z686 Branches. Delivery stations. Bookmobiles

Z687‑718.85 The collections. The books

Z688 Special collections

Z688.5‑Z688.6 Processing

Z689‑689.8 Acquisition (selection, purchase, gifts, duplicates)

Z690 Exchanges

Z691‑692 Special classes of materials

Including manuscripts, maps, microforms, serials

Z693‑695.83 Cataloging

Z695.85 Library handwriting

Z695.87 Printing of catalogs

Z695.9‑695.94 Indexing. Abstracting

Z695.95 Alphabetizing. Filing

Z695.98 Recataloging. Reclassification

Z696‑697 Classification and notation

Z698 Shelflisting. Author notation

Z699‑699.5 Machine methods of information and retrieval.

Mechanized bibliographic control

Z699.7 Physical processing. Shelf preparation

Z700 Bookbinding

Z700.9‑701.5 Physical parameters, preservation, conservation and

restoration of books and other library materials

Z702 Thefts and losses of books and other library materials

Z703.5 Stack management. Disposition of books on shelves,


Z703.6 Discarding. Weeding

Z711‑711.95 Public services. Reference services

Z712‑714 Circulation. Loans. Charging systems

Z716‑716.15 Library extension. Library commissions. Traveling


Z716.2‑718.85 Libraries in relation to special topics

Including libraries and community, libraries and

television, children’s libraries, libraries and


Z719‑723 Libraries (General)

Z729‑875 Library reports. History. Statistics

Z881‑977 Library catalogs and bulletins

Z987‑996.3 Book collecting

Including bibliophilism, bookplates

Z997-997.2 Private libraries


Z999‑1000.5 Booksellers’ catalogs

Z1001‑1121 General bibliography

Z1001 Introduction to bibliography. Theory, philosophy,

psychology. Bibliography. Documentation

Z1003‑1003.5 Choice of books. Books and reading. Book reviews

Z1003.8‑Z1004 Biography of bibliographers

Z1011‑1017 General bibliographies

Z1019‑1033 Special classes of books

Including prohibited books, rare books, paperbacks,


Z1035‑1035.9 Best books

Z1036 Booksellers’ general catalogs of modern books

Z1037‑1039 Books for special classes of persons, institutions, etc.

Z1041‑1107 Anonyms and pseudonyms

Z1201‑4980 National bibliography

Z1201‑1946 America

Z1215‑1363 United States

Z1365‑1401 Canada. British North America

Z1411‑1939 Mexico. Central America. West Indies. South America

Z1975 Eastern Hemisphere

Z2000‑2959 Europe

Z3001‑3496 Asia

Z3501‑3975 Africa

Z4001‑4980 Australia. Oceania

Z5051‑7999 Subject bibliography

Subjects arranged in alphabetical sequence

Z8001‑8999 Personal bibliography

Names of individuals arranged in alphabetical sequence


Subclass ZA


ZA3038‑5190 Information resources (General)

ZA3150‑3159 Information services. Information centers

ZA3201‑3250 Information superhighway

ZA4050‑4775 Information in specific formats or media

ZA4050‑4480 Electronic information resources

ZA4150‑4380 Computer network resources

ZA4450‑4460 Databases

ZA4550‑4575 Motion pictures. Video recordings

ZA4650‑4675 Pictures. Photographs

ZA4750‑4775 Sound recordings

ZA5049‑5190 Government information

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