title: Library of Congress Classification:Class Z -- Bibliography. Library Science. Information resources
text: # Library of Congress Classification:Class Z -- Bibliography. Library Science. Information resources
  
  Class Z: Bibliography. Library Science. Information resources is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class Z.
  
  ## Z - Books (general). Writing. Palaeography. Book Industries and trade. Libraries. Bibliography
  
      4-115.5...............Books (General). Writing. Paleography
         4-8..................History of books and bookmaking
         40-104.5.............Writing
            41-42.5.............Autographs. Signatures
            43-45...............Calligraphy. Penmanship
            48..................Duplicating processes. Copying services. Including mimeographing, multilithing
            49-51.5.............Typewriters. Typewriting. Keyboards. Keyboarding
            52-52.5.............Word processing
            53-102..............Shorthand. Stenography. Phonography
            102.5-104.5.........Cryptography. Cipher. Invisible writing
         105-115.5............Manuscript. Paleography
      116-659...............Book industries and trade
         116.A2...............Treatises on the modern printed book
         116.A3...............Book design
         116.A5-265.5.........Printing
            124-228.............History
            231-234.............Printers and printing establishments
               234................Medallic history of printing. Tokens
            235-236.............Printer's marks, mottoes, etc.
            237.................Paper. Watermarks, etc.
            240-241.5...........Incunabula. Block books. Including broadsides, playing cards
            242.9-264.5.........Practical printing. Including printing as a business, layout, paper and ink, machinery, type and type founding, electrotyping, desktop publishing, typesetting, presswork
            265-265.5...........Representation or reproduction of books, documents, etc., by photography, microphotography, or other means
         266-276..............Bookbinding. Book decoration
         278-549..............Bookselling and Publishing
         551-656..............Copyright
         657-659..............Freedom of the press. Censorship
      662-1000.5............Libraries
         662-664..............Collections
         665-718.8............Library science. Information science
            668-669.7...........Library education. Research
            672-Z672.13.........Library cooperation and coordination
            674.7-674.83........Library information networks
            675.................Classes of libraries
            678-678.88..........Library administration and organization. Constitution
            678.89-678.892......Library service agencies
            678.9-Z678.93.......Automation
            679-680.............Library buildings. Library architecture. Including planning, space utilization, security, safety, lighting, etc.
            680.3-680.6.........Library communication systems
            681-681.3...........Reproduction of library materials. Storage media of library materials
            681.5-681.7.........Trustees. Library boards, committees, etc.
            682-682.4...........Personnel
            683-683.5...........Finance. Insurance
            684-685.............Supplies. Shelving. Bookstacks
            686.................Branches. Delivery stations. Bookmobiles
            687-718.85..........The collections. The books
               688................Special collections
               688.5-688.6........Processing
               689-689.8..........Acquisition (selection, purchase, gifts, duplicates)
               690................Exchanges
               691-692............Special classes of materials. Including manuscripts, maps, microforms, serials
               693-695.83.........Cataloging
               695.85.............Library handwriting
               695.87.............Printing of catalogs
               695.9-695.94.......Indexing. Abstracting
               695.95.............Alphabetizing. Filing
               695.98.............Recataloging. Reclassification
               696-697............Classification and notation
               698................Shelflisting. Author notation
               699-699.5..........Machine methods of information and retrieval. Mechanized bibliographic control
               699.7..............Physical processing. Shelf preparation
               700................Bookbinding
               700.9-701.5........Physical parameters, preservation, conservation and restoration of books and other library materials
               702................Thefts and losses of books and other library materials
               703.5..............Stack management. Disposition of books on shelves, etc.
               703.6..............Discarding. Weeding
            711-711.95..........Public services. Reference services
            712-714.............Circulation. Loans. Charging systems
            716-716.15..........Library extension. Library commissions. Traveling libraries
            716.2-718.85........Libraries in relation to special topics. Including libraries and community, libraries and television, children's libraries, libraries and students
         719-723..............Libraries (General)
         729-875..............Library reports. History. Statistics
         881-977..............Library catalogs and bulletins
         987-996.3............Book collecting. Including bibliophilism, bookplates
         997-997.2............Private libraries
         999-1000.5...........Booksellers' catalogs
      1001-1121.............General Bibliography
         1001.................Introduction to bibliography. Theory, philosophy, psychology. Bibliography. Documentation
         1003-1003.5..........Choice of books. Books and reading. Book reviews
         1003.8-1004..........Biography of bibliographers
         1011-1017............General bibliographies
         1019-1033............Special classes of books. Including prohibited books, rare books, paperbacks, reprints
         1035-1035.9..........Best books
         1036.................Booksellers' general catalogs of modern books
         1037-1039............Books for special classes of persons, institutions, etc.
         1041-1107............Antonyms and pseudonyms
      1201-4980.............National bibliography
         1201-1946............America
            1215-1363..........United States
            1365-1401..........Canada. British North America
            1411-1939..........Mexico. Central America. West Indies. South America
         1975................Eastern Hemisphere
         2000-2959...........Europe
         3001-3496...........Asia
         3501-3975...........Africa
         4001-4980...........Australia. Oceania
      5051-7999............Subject bibliography. Subjects arranged in alphabetical sequence
      8001-8999............Personal bibliography. Names of individuals arranged in alphabetical sequence
  
  ## ZA - Information Resources (General)
  
      3038-5190...........Information resources (General)
         3150-3159..........Information services. Information centers
         3201-3250..........Information superhighway
         4050-4775..........Information in specific formats or media
            4050-4480.........Electronic information resources
               4150-4380........Computer network resources
               4450-4460........Databases
         4550-4575..........Motion pictures. Video recordings
         4650-4675..........Pictures. Photographs
         4750-4775..........Sound recordings
      5049-5190...........Government information
  