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001 Science
001(479.25) Science — Armenia
001.18 Science–Forecasting
001.8 Science–Methodology
001.89 Science–Research
001.894 Inventions Inventions–Patents
001.895 Innovations
001.94 Natural phenomena
002 Printing Books Typography
002(479.25) Printing, Armenian
002.2 Books
002(479.25)(09) Books–Armenia–History Printing, Armenian–History.
002.6
003 Writing Alphabet
003(479.25) Writing, Armenian
004 Computer science. Data processing
005 Programming (Computers) Programming languages (Computers)
006 Standardization
007 Cybernetics Information Theory.
008 Civilization Culture Cultural property
008(479.25) Civilization–Armenia Culture –Armenia
01 Bibliography Catalogs Bibliographical citations
01(075) Bibliography–Handbooks, manuals, etc.
01(09) Bibliography–History
01(479.25) Amenian literature– Bibliography
011 Universal bibliography. Bibliography, International
012 Personal bibliography
013 Collective bibliographies
014 Periodicals–Bibliography
015
016:0/9 Special subject bibliography
016:001 Science– Bibliography
016:002 Printing–Bibliography.
016:01 Bibliographical literature–Bibliography. Bibliography of bibliographies.
016:02 Library science–Bibliography
016:05/07 Periodicals–Bibliography
016:087.5 Children’s literature–Bibliography
016:091 Codicology–Bibliography Manuscripts–Bibliography
016:1 Philosophy — Bibliography
016:2 Religious literature–Bibliography
016:3К Communism– Bibliography Marxism–Bibliography Leninism–Bibliography
016:3 Politics– Bibliography
016:338 Economics — Bibliography
016:34 Law — Bibliography
016:34(05) Law reviews — Bibliography
016:355 Military art and science — Bibliography
016:37 Education — Bibliography
016:4 Philology — Bibliography
016:5 Natural history — Bibliography
016:51 Mathematics — Bibliography
016:52 Astronomy — Bibliography
016:53 Physics — Bibliography
016:54 Chemistry — Bibliography
016:55 Geology — Bibliography
016:6/62 Engineering — Bibliography
016:61 Medicine — Bibliography
016:63 Agriculture — Bibliography
016:7 Art — Bibliography
 016:796 Sport — Bibliography
016:8 Literature — Bibliography
016:821.161.1 Russian literature — Bibliography
016:821.19 Armenian literature — Bibliography
016:94 History — Bibliography
016:902.5 Archives — Bibliography
016:902.6 Archaeology — Bibliography
016:902.7 Ethnology — Bibliography
016:91 Geography — Bibliography
016:929 Biobibliographies
017 Library catalogs
017.1 Public libraries–Catalogs
017.3 Booksellers’ catalogs.
017.4 Publishers’ catalogs.
017.4(479.25) Booksellers’ catalogs — Armenia
017.43 Antiquarian booksellers — Catalogs
018
02 Library science
 02(03) Library science — Dictionaries
02(075/077) Library science — Handbooks, manuals, etc.
02(09) Library science — History
021 Libraries
021(470+571) Library science — Russia
021(479.25) Library science — Armenia
022 Library buildings Library architecture
023 Library administration Library personnel management
023.5 Library employees
024 Public services (Libraries) Reference services (Libraries)
024.6 Interlibrary loans
025 Libraries– Departments
025.2 Acquisitions (Libraries)
025.3 Library catalog management
025.342 Library catalogs and users . Author catalogs
025.343.2 Subject catalogs.
025.4 Library and bibliographic classification (LBC)
025.45  Classification, Universal decimal
025.6 Libraries, Subscription
025.7/9 Libraries, Depository Collection development (Libraries)
026 Special libraries
027 General libraries
027.021 Research libraries
027.1 Private libraries
027.2  Academic libraries
027.5 State libraries
027.5(479.25) National Library of Armenia
027.52 Public libraries
027.53 Regional libraries District libraries
027.625 Children’s libraries
027.7 Academic libraries
027.8 School libraries
028 Reading Readers’ advisory services
028.5 Children–Books and reading Youth–Books and reading
03 Encyclopedias and dictionaries
03/08 Encyclopedias and dictionaries. Directories
05/07 Newspapers The Press Journalism
05 Periodicals Journalism
058 Periodicals — Armenia — History
058(479.25) Armenia– Yearbooks–Directories, address books
059 Almanacs Calendars
06 Associations, institutions, etc.
061 Associations, institutions, etc.
061.068 Titles of honor and nobility Award winners
061.12(479.25) National Academy of Sciences of the Republic of Armenia (NAS RA)
061.2 Non-governmental organizations
061.213 Youth organizations
061.213 Scouts and scouting Boy Scouts Scouts (Youth organization members)
061.213 Secret societies
061.236.61 Masonic Society (Org.)
061.3 Congresses and conventions Symposiums
061.4 Exhibitions Expositions
061.6 Scientific institutions
069 Museums
069.4 Museum exhibits–Conservation and restoration
069.53 Museum exhibits–Technological innovations
070 Mass media.
070(470+571) Mass media — Russia
070(479.25) Mass media — Armenia
070.13 տես նաև՝ 351.751.5 Press–Censorship Freedom of the press
070.4
070.42 Journalists
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087.1:0/9 Popular literature
087.5 Children’s literature.
09 Manuscripts Rare books
090.1
091 Manuscripts
091(479.25)  Manuscripts — Armenia Mesrop Mashtots Institute of Ancient Manuscripts
093 Incunabula Early printed books–15th century
094 Rare books
097