| 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 |
| 08 |
| 082 |
| 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 |