| AAC | : | Advanced Audio Coding |
| AACOBS | : | Australian Advisory Council on Bibliographical Services |
| AACR | : | Anglo American Cataloguing Rule |
| AAL | : | Association of Assistant Librarian |
| AALL | : | The American Association of Law Libraries |
| AALS | : | The Association of American Library School |
| AAMBP | : | Association of American Medical Book Publishers |
| AAMC | : | Association of American Medical Colleges |
| AATA | : | Art and Archaeology Technical Abstracts |
| AAUP | : | Association of American University Press |
| ABC | : | Abridged Bibliographic Classification |
| ABI | : | Application Binary Interface |
| ABLISS | : | Association of British Library and Information science schools |
| ABN | : | Australian Bibliographic Network |
| ACCOPI | : | Access Control and Copyright Protection for Images |
| ACE | : | Automatic Computing Engine |
| ACM | : | Association for Computing Machinery |
| ACPM | : | Australian Common Practice Manual |
| ACQNET | : | Acquisitions Librarians Electronic Network |
| ACRL | : | Association of College and Research Libraries |
| ACURIL | : | Association of Caribbean University, Research and Institutional Libraries |
| ADI | : | American Documentation Institute |
| ADP | : | Automated Data Processing |
| AFAS | : | French Association for Sound Archives |
| AFLI | : | Arab Federation for Libraries and Information |
| AFSARI | : | Automation for Storage and Retrieval of Information |
| AGM | : | Annual General Meeting |
| AGRIS | : | Agricultural Information System of International Information System for the Agricultural science & Technology |
| AHA | : | Accelerated Hub Architecture |
| AI | : | Artificial Intelligence |
| AIBA | : | Agricultural Information Bank of Asia |
| AICCM | : | Australian Institute for the Conservation of Cultural Materials |
| AID | : | Associative Interactive Dictionary |
| AIIP | : | Association of Independent Information Professionals |
| AIRS | : | Alliance of Information and Referral Systems |
| AJAX | : | Asynchronous JavaScript and XML |
| ALA | : | American Library Association |
| ALCTS | : | The Association for Library Collections & Technical Services |
| ALGOL | : | Algorithmic Language |
| ALIA | : | Australian Library and Information Association |
| ALISE | : | Association for Library and Information Science Education |
| ALP | : | Advancement of Librarianship in the Third World Programme (IFLA) |
| ALPAC | : | Automatic Language Processing Advisory Committee |
| ALPSP | : | Association of Learned and Professional Society Publishers |
| ALS | : | Automated Library System |
| ALSD | : | Academy of Library science and Documentation |
| ALTA | : | American Library Trustees Association |
| ALU | : | Arithmetic Logic Unit |
| AMI | : | Association of Medical Illustrators |
| AMIC | : | Asian Mass communication and Research center |
| AMULA | : | Aligarh Muslim University Libraries Association |
| ANSI | : | American National Standards Institute |
| AOC | : | Army Ordnance Corps |
| APALA | : | Asian Pacific American Librarians association |
| APCTT | : | Asian Pacific Center for Transfer of Technology |
| API | : | Application Programming Interface. |
| APINESS | : | Asia-Pacific Information Network in Social Sciences |
| APINMAP | : | Asian and Pacific information Network on Medicine and Aromatic Plants |
| APPLE | : | Ariane Passenger Pay Load Experiment |
| APPM | : | Archives, Private Papers and Manuscripts (USA) |
| APSDEP | : | Asian and Pacific Skill Development |
| ARIC | : | Agricultural Research Information Center |
| ARIST | : | Art Libraries Society |
| ARL | : | Association of Research Libraries. |
| ARLIS | : | Annual Review of Information Science and Technology |
| ARMA | : | Association of Records Managers and Administrators; American Records Management Association |
| ARPANET | : | Advanced Research Project Network |
| ARSC | : | Association for Recorded Sound Collections |
| ASA | : | Americans Standard Association |
| ASCII | : | Americans Standard code for Information Interchange |
| ASIS | : | American Society for Information Science. |
| ASLIB | : | Association of Special Libraries and Information Bureaux |
| ASTINFO | : | Regional Network for the exchange of information and experience in science and technology in Asia and the Pacific |
| ASM | : | American Society for Metals |
| ATIS | : | Appropriate Technology Information Service |
| AUBC | : | All Union Book chamber |
| AUDACIOUS | : | Automatic Direct Access to Information with an On-Line UDC System |
| BA | : | Biological Abstracts |
| BAILER | : | British Association for Information and Library Education and Research |
| BANKNET | : | Computer Network of Bank |
| BANSDOC | : | Bangladesh National Scientific and Technical Documentation Center |
| BARC | : | Bhabha Atomic Research Center |
| BASIC | : | Beginners all Purpose Symbolic Instruction Code |
| BBC | : | British Broadcasting Corporation |
| BBIP | : | British Book in Print |
| BBS | : | Bulletin Board System |
| BC | : | Bibliographic Classification |
| BCA | : | Bliss classification Association |
| BRC | : | Bibliography of Current Reports |
| BHI | : | British Humanities Index |
| BHULSA | : | Banaras Hindu University Library Science Students Association |
| BIDS | : | Bath Information and Data Services |
| BIOSIS | : | bioscience Information Service |
| BIRS | : | British Institute of Recorded Sound |
| BIS | : | The Bureau of Indian Standard |
| BISA | : | Bibliographic Information on South-East Asia |
| BITNET | : | Because It is Time Network |
| BL | : | British Library |
| BLACMP | : | Birmingham Library Co-operative Mechanisation Project |
| BLAISE | : | British Library Automated Information Service |
| BLDSC | : | British Library Document Supply Centre |
| BLISS | : | British Library Information Science Service |
| BLLD | : | British Library Lending Division |
| BLRD | : | British Library Research and Development |
| BM | : | British Museum |
| BNB | : | British National Bibliography |
| BPP | : | Books Presentation Programme |
| BPS | : | Bits Per Second |
| BS | : | British standard |
| BSA | : | Bibliographic Society American |
| BSI | : | British Standard Institute |
| BSO | : | Broad System of Ordering |
| BT | : | British Telecommunications plc |
| BTEC | : | Business and Technician Education Council |
| BTI | : | British Technology Index |
| BUBL | : | Bulletin Board for Libraries |
| CA | : | Chemical Abstracts |
| CAB | : | Citizens’ Advice Bureaux |
| CAD | : | Commission on Archival Development; Computer-Aided Design |
| CADIST | : | Centres d’Acquisitions et de Diffusion de l’Information Scientifique et Technique |
| CAIN | : | Cataloguing and Indexing |
| CAL | : | Computer-Assisted Learning |
| CALIBER | : | Convention on Automation of LIBraries in Education and Research Institutions. |
| CALIBNET | : | Calcutta Library Network |
| CAP | : | Centralised Acquisition of Periodicals |
| CAPL | : | Canadian Association of Public Libraries |
| CAR | : | Computer Assisted Retrieval |
| CARDS | : | Card Automated Reproduction Demand System |
| CARIS | : | Current Agricultural Research Information System |
| CARISPLAN | : | Caribbean Information System for Economic and Social Planning |
| CAS | : | Current Awareness Service |
| CASSI | : | Chemical Abstracts Service Source Index |
| CAT | : | Computer-Assisted Translation |
| CB | : | Citizens’ Band |
| CBI | : | Cumulative Book Index |
| CBS | : | Columbia Broadcasting System |
| CC | : | Colon Classification |
| CCC | : | Classified Catalogue Code |
| CCF | : | Common Communication Format |
| CCL | : | Common Commanded Language |
| CCT | : | Compulsory Competitive Tendering |
| CCTA | : | Central Computer and Telecommunications Agency |
| CCTV | : | Closed-Circuit Television |
| CD | : | Compact Disc |
| CDCR | : | Center for Documentation and Communication Research |
| CD-I | : | Compact Disc – Interactive |
| CDP | : | Custom Developed Programme |
| CD-R | : | Compact Disc – Recordable |
| CD- ROM | : | Compact Disc Read Only Memory |
| CDS/ISIS | : | Computerised Documentation System/ integrated Sets of Information System |
| CEAN | : | Central Electricity Authority Network |
| CEC | : | Commission of the European Communities |
| CEIS | : | Caribbean Energy Information System |
| CENID | : | National Centre for Information and Documentation (Chile) |
| CERN | : | European Centre for Nuclear Research |
| CESSDA | : | Committee of European Social Science Data Archives |
| CFTRI | : | Central Food Technological Research Institute |
| CHI | : | Computer–Human Interaction |
| CI | : | Citation Index |
| CIA | : | Central Intelligence Agency |
| CIC | : | Coconut Information Center |
| CICI | : | Confederation of Information Communication Industries |
| CIL | : | Central Institute of Indian Language |
| CILIP | : | Chartered Institute of Library and Information Professionals. |
| CIP | : | Cataloguing in Publication |
| CIRDAP | : | Center on Integrated Rural Development for Asia and the Pacific |
| CISTI | : | Canada Institute for Scientific and Technical Information |
| CITED | : | Copyright in Transferred Electronic Data |
| CITRA | : | Confe´rence Internationale de Table Ronde des Archives [International Conference of the Round Table on Archives] |
| CIX | : | Commercial Internet Exchange |
| CLA | : | Canada Library Association |
| CLENE | : | Continuing Library Education Network and Exchanged |
| CLR | : | Council on Library Resources |
| CLRI | : | Central Leather Institute |
| CLSCP | : | Copyright Libraries Shared Cataloguing Programme |
| CMS | : | Content Management System. |
| CMTI | : | Central Machine Tool Institute |
| COBOL | : | Common Business Oriented Language |
| CODATA | : | Committee on data for science and Technology |
| COM | : | Computer Output Microfilm |
| COMLA | : | Commonwealth Library Association |
| COMPENDEX | : | Computerised Engineering Index |
| COPICAT | : | Copyright Ownership Protection in Computer-Assisted Twinning |
| CORMOSEA | : | Committee on Deposit Material on Southeast Asia |
| CONSAL | : | Congress of Southeast Asian Librarians |
| COPSAT | : | Current Online Patent in Science and Technology |
| COUNTER | : | Counting Online Usage of Networked Electronic Resources |
| CPD | : | Continuing Professional Development |
| CPI | : | Canadian Periodical Index |
| CPM | : | Critical Path Method |
| CPU | : | Central Processing Unit |
| CRG | : | Classification Research Group |
| CRLIS | : | Current Research in Library and Information Science |
| CRS | : | Computerized Reservation Systems |
| CSCW | : | Computer-Supported Co-operative Work |
| CSIR | : | Council of Scientific & Industrial Research |
| CSMA | : | Carrier Sense Multiple Access |
| CSMA/CD | : | Carrier Sense Multiple Access with Collision Detection |
| CSNET | : | Computer Science Network |
| CSIRO | : | Commonwealth Scientific and Industrial Research Organisation |
| CTI | : | Current Technology Index |
| CU | : | Control Unit |
| CURL | : | Consortium of University Research Libraries |
| DAE | : | Department of Atomic Energy |
| DARE | : | Department of Agricultural Research and Education |
| DARPNET | : | Defence Advanced Research Project Network |
| DAT | : | Digital Audio Tape |
| DBA | : | Documentation, Library and Archives Department of UNESCO |
| DBMS | : | Database Management System |
| DBS | : | Direct Broadcasting by Satellite |
| DBT | : | Department of Biotechnology |
| DC | : | Dictionary Catalogue |
| DCC | : | Digital Compact Cassette |
| DCE | : | Data Circuit-terminating Equipment |
| DCMI | : | Dublin Core Metadata Initiative. |
| DDC | : | Dewey Decimal Classification |
| DDS | : | Document Delivery Service |
| DELNET | : | Delhi Library Network |
| DES | : | Data Encryption Standard |
| DESIDOC | : | Defence Scientific Information and Documentation center |
| DEVINSA | : | Development Information Network on South Asia |
| DEVSIS | : | Development Science Information System |
| DIN | : | Document Identification Number |
| DIN | : | Document Identification Number |
| DIP | : | Document Image Processing |
| DIS | : | Development Information System |
| DLA | : | Delhi Library Association |
| DLF | : | Digital Library Federation. |
| DMAIC | : | Define, Measure, Access, Improve and Control. |
| DMP | : | Dot Matrix Printer |
| DNB | : | Dictionary of National Biography |
| DNES | : | Department of Non-Conventional Energy Sources |
| DNS | : | Domain Naming System. |
| DOD | : | Department of Ocean Development |
| DOS | : | Disc Operating System |
| DRDO | : | Defence Research and Development Organisation |
| DRTC | : | Documentation Research and Training Center |
| DSIR | : | Department of Scientific and Industrial Research |
| DSP | : | Digital Signal Processor |
| DSS | : | Decision Support Systems |
| DST | : | Department of Science and Technology |
| DTE | : | Data Terminal Equipment |
| DTI | : | Department of Trade and Industry |
| DTP | : | Desk Top Publishing |
| EAGLE | : | European Association for Grey Literature Exploitation |
| EBLIDA | : | European Bureau of Library, Information and Documentation Associations |
| EC | : | Expansive Classification |
| ECHO | : | European Commission Host Organization |
| EDI | : | Electronic Data Interchange |
| EDSAC | : | Electronic Delay Storage Automatic Computer |
| EGA | : | Extended Graphic Adopter |
| EIIA | : | European Information Industry Association |
| EIRENE | : | European Information Researchers Network |
| ELBS | : | Educational Low-priced Books Scheme |
| ENIAC | : | Electronic Numerical Integration and Calculator |
| ENVIS | : | Environment Information System |
| EPIDOS | : | European Patent Information and Documentation Systems |
| EPLA | : | East Pakistan Library Association |
| EPO | : | European Patent Office |
| EPROM | : | Erasable Programmable Read Only Memory |
| ERIC | : | Educational Resource Information Center |
| ERNET | : | Education and Research Network |
| EROMM | : | European Register of Microform Masters |
| ES | : | Expert Systems |
| ESAIRS | : | European Space Agency Information Retrieval Service |
| ESPRIT | : | European Strategic Programme for Research in Information Technologies |
| ESRC | : | Economic and Social Research Council |
| ESTC | : | Eighteenth-century Short-Title Catalogue |
| ESTC-NA | : | Eighteenth-century Short-Title Catalogue North America |
| ETC | : | European Translation Center |
| ETS | : | European Telecommunications Standards |
| EU | : | European Union |
| EUCLID | : | European Conference of Library and Information Departments |
| EUNET | : | European Network |
| EUSIDIC | : | European Association of Information Services |
| FAIS | : | Foreign Affairs Information System |
| FBI | : | Federal Bureau of Investigation |
| FDDI | : | Fibre Distributed Data Interface |
| FIAC | : | Federation of Independent Advice Centres |
| FID | : | International Federation for Information and Documentation |
| FIDA | : | International Archival Development Fund |
| FILA | : | Federation of Indian Library Association |
| FLA | : | Fellow of the Library Association |
| FOI | : | Freedom of Information |
| FOIA | : | Freedom of Information Act |
| FORTRAN | : | Formula Translator |
| FSU | : | Former Soviet Union |
| FT | : | Formula Translator |
| FTE | : | Full-Time Equivalent |
| FTP | : | File Transfer Protocol |
| GATT | : | General Agreement on Tariffs and Trade |
| Gb | : | Gigabyte |
| GCI | : | Getty Conservation Institute |
| GCS | : | Global Cataloguing Service |
| GD | : | Geographical Device |
| GDP | : | Gross Domestic Product |
| GDSS | : | Group Decision Support Systems |
| GILS | : | Government Information Locator Service |
| GIS | : | Geographic Information System |
| GOC | : | Good Office Committee |
| GUI | : | Graphical User Interface |
| GUIDE | : | Graphical User Interface Design and Evaluation |
| HCI | : | Human–Computer Interaction |
| HDTV | : | High Definition Television |
| HEA | : | Higher Education Act |
| HELLIS | : | Health Literature Library and Information Service |
| HF | : | Human Factors |
| HMSO | : | Her Majesty’s Stationery Office |
| HRD | : | Human Resource Development |
| HRM | : | Human Resource Management |
| HRP | : | Human Resource Planning |
| HSE | : | Human Resource Planning |
| HTML | : | HyperText Mark-up Language |
| IAEA | : | International Atomic Energy Agency |
| IALL | : | International Association of Low Libraries |
| IAMIC | : | International Association of Music Information Centres |
| IAML | : | International Association of Music Libraries |
| IARIL | : | International Association of Rural and Isolated Libraries |
| IAS | : | Individual Article Supply |
| IASA | : | International Association of Sound Archives |
| IASLIC | : | Indian Association of Special Libraries and Information Center |
| IASSIST | : | International Association for Social Science Information Service and Technology |
| IATUL | : | IInternational Association of Technological University Libraries |
| IBB | : | International Business Machine |
| IBBY | : | International Board on Books for Young People |
| IBI | : | Intergovernmental Bureau of Information |
| IBICT | : | Brazilian Institute for Information in Science and Technology |
| IBM | : | International Business Machine |
| ICA | : | Information Center for Aeronautics |
| ICAR | : | Indian Council of Agricultural Research |
| ICCR | : | Indian Council of Cultural Relation |
| ICDM | : | Information Center for Development Policy Modeling |
| ICDR | : | International Center for Diarrheal Diseases Research |
| ICHR | : | Indian Council of Historical Research |
| ICMR | : | Indian Council of Medical Research (New Delhi) |
| ICPR | : | Indian Council of Philosophical Research |
| ICs | : | Integrated Circuits |
| ICSSR | : | Indian Council for Social Science Research |
| ICSU | : | International Council of Scientific Unions |
| ID | : | Identification |
| IDA | : | Integrated Digital Access |
| IDC | : | International Documentation Centre |
| IDRC | : | International Development Research Centre |
| IDSA | : | Institute of Defense Studies and Analysis |
| IEC | : | International Electrotechnical Commission |
| IEEE | : | Institute of Electrical and Electronics Engineers, Inc. |
| IFD | : | International Federation for Documentation |
| IFDO | : | International Federation of Data Organizations |
| IFIS | : | International Food Information Service |
| IFLA | : | International Federation of Library association and Institution |
| IHAC | : | Information Highway Advisory Council |
| IIB | : | International Institute of Bibliography; Institut International de Bibliographie (Now FID) |
| IIC | : | International Institute for the Conservation of Art and Historic Artefacts |
| IIC-GC | : | International Institute for Conservation – Canadian Group |
| IIR | : | Intelligent Information Retrieval |
| IIS | : | Institute of Information Scientists |
| IK | : | Indigenous Knowledge |
| ILA | : | Indian Library Association |
| ILL | : | Inter Library Loan |
| ILSA | : | Indian Library Science Abstract |
| IM | : | Information Management |
| INB | : | Indian National Bibliography |
| INFLIBNET | : | Information & Library Network |
| INFOTERRA | : | International Referral System for environmental Information |
| INIS | : | International Nuclear Information System |
| INIST | : | Institut de l’Information Scientifique et Technique |
| INPADOC | : | International Patent Documentation Service |
| INSAT | : | Indian National Satellite |
| INSDOC | : | Indian National Scientific Documentation Center |
| IPA | : | International Publishers Association |
| IPC | : | Institute for Paper Conservation |
| IR | : | Information Retrieval |
| IRC | : | Internet Relay Chat |
| IRM | : | Information Resource(s) Management |
| IRPTC | : | International Register of Potentially Toxic Chemicals |
| IRS | : | Information Retrieval System |
| IRTC | : | Industrial Toxicology Research Center |
| IS | : | Information Superhighway |
| ISA | : | Indian Standardization Association |
| ISBD | : | International Standard Bibliographic Description |
| ISBN | : | International Standard Book Number |
| ISDN | : | Integrated Service Digital Network |
| ISDS | : | International Serials Data System |
| ISA | : | Indian Standard Institution |
| ISI | : | Institute for Scientific Information |
| ISMN | : | International Standard Music Number |
| ISO | : | International Standard Organization |
| ISONET | : | International Organization for Standardization Network |
| ISRN | : | International Standard Recording Number |
| ISRO | : | Indian Space Research Organization |
| ISSN | : | International Standard Serial Number |
| IT | : | Information Technology |
| ITC | : | International Translations Centre |
| ITIB | : | Industrial and Technological Information Bank |
| ITU | : | International Telecommunications Union |
| JANET | : | Joint Academy Network |
| JASIST | : | Journal of the American Society for Information Science and Technology |
| JELIS | : | Journal of Education for Library and Information Science |
| JLA | : | Japan Library Association |
| JPRS | : | Joint Publications Research Service |
| JSC | : | Joint Steering Committee for Revision of AACR |
| Kb | : | Kilobyte |
| KBMT | : | Knowledge-Based Machine Translation |
| KGB | : | Knowledge Generation exchange and Utilization |
| KGEU | : | Knowledge Generation exchange and Utilization |
| KIPS | : | Knowledge Information Processing System |
| KLA | : | Korean Library Association |
| KWAC | : | KeyWord and Contex |
| KWIC | : | Key Word in Context |
| KWIC | : | Key Word in Context |
| KWOC | : | Key Word in Context |
| LA | : | Library Association |
| LA (UK) | : | The Library Association of the United Kingdom |
| LAA | : | Library Association of Australia |
| LAB | : | Library Association of Bangladesh |
| LAC | : | Library Association of China |
| LAN | : | Local Area Network |
| LAP-B | : | Link Access Procedure – Balanced Protocol |
| LAPL | : | Library Association Publishing Limited |
| LASER | : | London and Southeast Regional Library Bureau |
| LAUK | : | Library Association of the United Kingdom; now the Library Association |
| LC | : | Library of Congress |
| LCC | : | Library of Congress Classification |
| LCCDG | : | Library Collections Conservation Discussion Group |
| LCMARC | : | Library of Congress Machine-Readable Cataloging |
| LCSH | : | Library of Congress Subject Headings |
| LED | : | Light-Emitting Diode |
| LIBRIS | : | Library and Information System |
| LINC | : | Library and Information Co-operation Council |
| LIP | : | Library and Information Plan |
| LIS | : | Library and Information Science |
| LISA | : | Library and Information Science Abstract |
| LISC | : | Library and Information Science |
| LIST | : | Library and Information Science Today |
| LITA | : | Library and Information technology Association |
| LIU | : | Local Information Unit |
| LLA | : | Local Information Unit |
| LLC | : | Logical Link Control |
| LML | : | Logical Link Control |
| LOCAS | : | Local catalogue Service |
| LOCIS | : | Library of Congress Information System |
| LOEX | : | Library Orientation Instruction Exchange |
| LP | : | Long-Playing Record |
| LSA | : | Library science Abstract |
| LSI | : | Large Scale Integration |
| LUCI | : | Logical Unit based Cyclic Index |
| MA | : | Master of Arts |
| MA | : | Museums Association |
| MAD2 | : | Manual of Archival Description, 2nd edn (UK) |
| MADAM | : | Manchester Automatic Digital Machine |
| MALA | : | Madras Library Association |
| MALMARC | : | Malaysian MARC |
| MAMLIBNET | : | Madras Library Network |
| MAN | : | Metropolitan Area Network |
| MAP | : | Manufacturing Automation Protocol |
| MARBI | : | Machine Readable form of Bibliographic Information |
| MARC | : | Machine Readable catalogue |
| MAT | : | Machine-Aided Translation |
| Mb | : | Megabyte |
| MBO | : | Management by Objective |
| MDA | : | Museums Documentation Association |
| MEDLARS | : | Medical Literature Analysis and Retrieval System |
| MERLIN | : | Machine Readable Library information (UK) |
| MeSH | : | Medical Subject Headings |
| MHz | : | Megahertz |
| MI | : | InfSci Member, Institute of Information Scienists |
| MICR | : | Magnetic Ink Character Recorder |
| MIDI | : | Musical Instrument Device Interface |
| MIDLINET | : | Midwest Region Library Network |
| MILNET | : | Military Network |
| MIMOS | : | Malaysian Institute of Microelectronic Systems |
| MIP | : | Modern Information Professional |
| MIS | : | Management Information System |
| MISS | : | Medical Information Science Section (USA) |
| MIT | : | Management Information System |
| MLA | : | Medical Library Association (USA) |
| MLS | : | Master of Library Science/Studies |
| MOL | : | Mail Order Library |
| MMI | : | Man–Machine Interaction |
| MMS | : | Man–Machine Systems |
| MOS | : | Metal Oxide Semiconductor |
| MPC | : | Multimedia Personal Computers |
| MPhil | : | Master of Philosophy |
| MPM | : | Multimedia Presentation Manager |
| MS | : | Manuscript |
| MS-DOS | : | Microsoft Disk Operating System |
| MSI | : | Medium Scale Integration |
| MSS | : | Management Support System |
| MT | : | Machine Translation |
| MUSE | : | Music Search |
| MWSS | : | Microsoft Windows Sound System |
| NACAB | : | National Association of Citizens’ Advice Bureaux |
| NACILA | : | National Council of Indian Library Association |
| NACL | : | National Advisory Commission on Libraries (USA) |
| NACO | : | National Coordinated Cataloguing Operations |
| NACSIS | : | National Centre for Scientific Information Systems |
| NAG | : | National Acquisitions Group |
| NAI | : | National Archives of India |
| NAL | : | National Aeronautical Laboratory |
| NAL | : | National Agricultural Library (USA) |
| NAPC | : | National Programme for Acquisition and Cataloguing |
| NARA | : | National Archives and Records Administration |
| NASA | : | National Aeronautical and Space Administration |
| NASSDOC | : | National Social Science Documentation Center |
| NATIS | : | National Information System |
| NBC | : | National Broadcasting Corporation |
| NBLC | : | Nederlands Bibliotheek en Lektuur Centrum [Dutch Centre for Public Library Literature] |
| NBS | : | National Bibliographic Service |
| NBT | : | National Book Trust |
| NCCP | : | National Coordinated Cataloguing Programme |
| NCIP | : | North American Collection Inventory Project |
| NCL | : | National Central Library |
| NCL | : | National Chemical Laboratory |
| NCSI | : | National Centre for Science Information |
| NDLP | : | Netherlands Library Development Project |
| NEPHIS | : | Nested Phrase Indexing System |
| NGO | : | Non-Governmental Organization |
| NHS | : | National Health Service |
| NIC | : | National Informatics Center |
| NICDAP | : | National Information Centre for Drug and Pharmaceuticals |
| NICFOS | : | National Information Centre for Chemistry and Chemical Technology |
| NICLAI | : | National Information Centre for Leather and Allied Industry |
| NICMAP | : | National Information Centre for Machine Tools and Allied Products |
| NICNET | : | National Informatic Centre Network |
| NIDOC | : | National Information and Documentation Centre |
| NIFOR | : | National Information Service |
| NII | : | National Institute of Immunology |
| NILA | : | North India Library Association |
| NIP | : | National Information Policy |
| NISIET | : | National Institute of Small Industry Extension Training |
| NISO | : | National Information Standards Organization |
| NISS | : | National Social Science Information System |
| NISSAT | : | National Information System for Science and Technology |
| NLB | : | National Library for the Blind |
| NLB | : | National Library of Bangladesh |
| NLG | : | National Libraries Group |
| NLLST | : | National Lending Library for Science and Technology |
| NLM | : | National Library of Medicine |
| NLSFBPH | : | National Library Service for the Blind and Physically Handicapped |
| NML | : | National Medical Library |
| NNLM | : | National Network for Libraries in Medicine |
| NORDBOK | : | Nordic Literature and Library Committee |
| NORDINFO | : | Nordic Committee on Scientific Information and Documentation |
| NOSP | : | Nordic Union Catalogue of Scientific Periodicals |
| NREN | : | National Research and Education Network |
| NSA | : | National Sound Archive |
| NSDD | : | National Security Decision Directive |
| NSF | : | National Science Foundation |
| NSTP | : | New Straits Times Publications |
| NTA | : | National Telecommunications Agency |
| NTC | : | National Translation Centre |
| NTE | : | Network Terminating Equipment |
| NTIA | : | National Telecommunications and Information Administration |
| NTIS | : | National Technical Information Service |
| NUC | : | National Union Catalog |
| NUCMC | : | National Union Catalog of Manuscript Collections |
| NUCSSI | : | National Union Catalogue of Scientific Serials in India |
| NVQ | : | National Vocational Qualification |
| NWICO | : | New World Information and Communication Order |
| NYSILL | : | New York State Inter Library Loan Network |
| NYT | : | New York Times |
| OCLC | : | The On-lien Computer Library Centre |
| OCLC | : | Ohio College Library Centre |
| OCR | : | Optical Character Recognition |
| ODA | : | Open Document Architecture |
| OECD | : | Organization for Economic Cooperation and Development |
| OED | : | Oxford English Dictionary |
| OLAS | : | On-line Acquisition System |
| OLE | : | Object Linking and Embedding |
| OMB | : | One-Man Band |
| OMG | : | Object Management Group |
| OOS | : | Occupational Overuse Syndrome |
| OPAC | : | On-line Public access Catalogue |
| OPACS | : | Online Public-Access Catalogues |
| OPL | : | One-Person Libraries |
| OR | : | Operation Research |
| OSB | : | Order of St Benedict |
| OSI | : | Open System Interconnection |
| OSS | : | Office of Strategic Studies |
| PAC | : | Preservation and Conservation Core Programme (IFLA) |
| PAD | : | Packet Assembly/Disassembly Device |
| PANSDOC | : | Pakistan National Scientific and Technical Documentation Centre |
| PARC | : | Palo Alto Research Center |
| PASTIC | : | Pakistan Scientific and Technical Information Centre |
| PBWG | : | Pakistan Bibliographical Working Group |
| PC | : | Personal Computer |
| PDNs | : | Public Data Networks |
| PERT | : | Programme Evaluation and Review Technique |
| PGP | : | Pretty Good Privacy |
| PhD | : | Doctor of Philosophy |
| PIIC | : | Public Interest Immunity Certificate |
| PIN | : | Personal Identification Number |
| PINFET | : | PIN Field Effect Transistors |
| PIS | : | Patents Information System |
| PLA | : | Pakistan Library Association |
| PLR | : | Public Lending Right |
| PNB | : | Pakistan National Bibliography |
| POPIN | : | Population Information Network |
| POPSI | : | Postulate Based Permutated subject Indexing |
| POSDCORB | : | Planning Organizing Staffing Directing Co- ordinating Reporting and Budgeting |
| POTS | : | Plain Old Telephone System |
| PPBS | : | Planning Programming Budgeting System |
| PPP | : | Point to Point Protocol |
| PPRG | : | Publicity and Public Relations Group |
| PRECIS | : | Preserved context Indexing System |
| PRO | : | Public Records Office |
| PROM | : | Programmable Read Only Memory |
| PSS | : | Packet Switching System |
| PST | : | Permutes Subject Index |
| PSTN | : | Public Switched Telephone Network |
| PTLA | : | Publishers Trade List Annual |
| PTT | : | Posts, Telegraphs and Telephones |
| PULINET | : | Provincial University Library Network |
| QA | : | Quality Assurance |
| R&D | : | Research and Development |
| RAD | : | Rules for Archival Description (Canada) |
| RAILNET | : | Computer Network for Railways |
| RAM | : | Random access Memory |
| RAMP | : | Records and Archives Management Programme |
| RATER | : | Reliability, Assurance, Tangibles, Empathy and Responsiveness |
| RBU | : | Re´pertoire Bibliographique Universel |
| RCRC | : | Rural Community Resource Centre |
| RDC | : | Rules for Dictionary Catalogue |
| RENBU | : | National Network of University Libraries (Argentina) |
| RGA | : | Readers’ Guide Abstracts |
| RIC | : | Regional Information Centre |
| RIPM | : | Re´pertoire Internationale de la Presse Musicale |
| RISM | : | Re´pertoire Internationale des Sources Musicales |
| RLG | : | Research Libraries Group |
| RLIN | : | Research Library Information Network |
| RLS | : | Regional Library System |
| RMDC | : | Regional Mineral Resource Development Centre |
| RMS | : | Records Management Society |
| RNIB | : | Royal National Institute for the Blind |
| ROM | : | Read Only Memory |
| RRRLF | : | Raja Ram Mohan Roy Library Foundation |
| RSI | : | Repetitive Strain Injury |
| RT | : | Related Terms |
| SAA | : | Systems Applications Architecture |
| SAM | : | Serial Access Memory |
| SAMARC | : | South African Machine Readable Cataloguing |
| SARBICA | : | Southeast Asian Regional Branch of the International Council on Archives |
| SBDN | : | Satellite Based Data Network |
| SC | : | Subject Classification |
| SCECSAL | : | Standing Conference of East, Central and Southern African Librarians |
| SCI | : | Science Citation Index |
| SCONUL | : | Standing Conference of National and University Libraries |
| SDC | : | System Development Corporation |
| SDI | : | Selective Dissemination of Information |
| SEAMIC | : | South – East Asian Medical Information Centre |
| SENDOC | : | Small Enterprise National documentation Centre |
| SGML | : | Standard Generalized Mark-up Language |
| SHE | : | Subject Heading for Engineering |
| SIG | : | Special Interest Group |
| SIG | : | Special Interest Group |
| SIGLE | : | System for Information on Grey Literature in Europe |
| SILAS | : | Singapore Library Automation System SINASBI National System of Library Information |
| SISA | : | School of Information Studies for Africa |
| SIRNET | : | Scientific and Industrial Research Network |
| SL | : | Source Language |
| SLA | : | Special Libraries Association |
| SLB | : | Section of Libraries for the Blind |
| SLIP | : | Serial Line Internet Protocol |
| SMEs | : | Small and Medium-sized Enterprises |
| SNA | : | System Network Architecture |
| SNB | : | Singapore National Bibliography |
| SONET | : | Synchronous Optical Network |
| SPC | : | Stored Programme Control |
| SPIN | : | Special Interest Network |
| SPSS | : | Statistical Package for Social Science |
| SQL | : | Structured Query Language |
| SSDC | : | Social Science Documentation Centre |
| STC | : | Short Title Catalogue |
| STM | : | Scientific, Technical and Medical (book publishing) |
| STS | : | Science, Technology and Society |
| STSI | : | Science Technology and Social Information |
| STUDIO | : | Structured User Interface Design for Interaction Optimization |
| STV | : | Share the Vision |
| SWALCAP | : | South – West Academic Libraries Co-operative Automation Project |
| SWIFT | : | Society For Worldwide Interbank Financial Communications |
| TCP/IP | : | Transmission Control Protocol/Internet Protocol |
| TDF | : | Transborder Data Flow |
| TDNs | : | Terrestrial Data Networks |
| TELEX | : | Tele-printer Exchange |
| TFPL | : | Task Force Pro Libra |
| TIB | : | Technology Information Bank |
| TIFR | : | Tata Institute of Fundamental Research |
| TIPS | : | Technology Information Pilot System |
| TIS | : | Trade Information Service |
| LA | : | Target Language |
| TLA | : | Tripura Library Association |
| TLTP | : | Teaching and Learning Technology Programme |
| TNAUK | : | Talking Newspaper Association of the United Kingdom |
| TOP | : | Technical and Office Centre |
| TQM | : | Total Quality Management |
| TRC | : | Technology Research Center |
| TREC | : | Text Retrieval Evaluation Conference |
| TRIPS | : | Trade-Related Aspects of Intellectual Property Rights |
| TTL | : | Transistor – Transistor Logic |
| TV | : | Television |
| UAI | : | Universal Availability of Information |
| UAP | : | Universal Availability of Publications Programme (IFLA) |
| UBC | : | Universal Bibliographic Control |
| UBCIM | : | Universal Bibliographic Control and International MARC |
| UCL | : | University College London |
| UDC | : | Universal Decimal classification |
| UE | : | User Education |
| UGC | : | University Grant Commission |
| UIA | : | Union of International Associations |
| UIMS | : | User Interface Management System |
| UIN | : | User Identification Number |
| UKMARC | : | United Kingdom Machine-Readable Cataloguing |
| UMIST | : | University of Manchester Institute of Science and Technology |
| UNESCO | : | United Nation Education Scientific and Cultural Organization |
| UNIMARC | : | Universal Machine-Readable Cataloguing |
| UNISIST | : | United Nations Information System in Science and Technology |
| UNIVAC | : | Universal Automatic Computer |
| URL | : | Uniform Resource Locator |
| USSR | : | Union of Soviet Socialist Republics |
| UTLAS | : | University of Toronto Library Automation System |
| UWI | : | University of the West Indies |
| VAN | : | Value-Added Network |
| VAT | : | Value-Added Tax (EU countries) |
| VDT | : | Visual Display Terminal |
| VDU | : | Visual Display Unit |
| VGA | : | Video Graphic Adopter |
| VLSI | : | Very Large Scale Integration |
| VMS | : | Voice Mail Systems |
| VOD | : | Video On Demand |
| VR | : | Virtual Reality |
| VRAM | : | Video Random Access Memory |
| WADEX | : | Word and Author Index |
| WAIS | : | Wide-Area Information Server |
| WAN | : | Wide Area Network |
| WAPIS | : | Water and Power Information System |
| WARC | : | World Administrative Radio Conference |
| WHO | : | World Health Organization |
| WIMPS | : | Windows, Icons, Mouse, Pull-down menus |
| WIPO | : | World Intellectual Property Organization |
| WLN | : | Western Library Network |
| WLSP | : | World List of Scientific Periodicals |
| WORM | : | Write Once Read and many |
| WP | : | Word Processing |
| WPI | : | World Talents Index |
| WTI | : | World Translation Index |
| WWW | : | World Wide Web |
| WYSIWYG | : | What You See Is What You Get |
| ... | : | .... |
| YAS | : | Young Adult Service |
| ZBB | : | Zero Base Budgeting |
