| Abk. | Bedeutung | Kontext |
| a-Si:H | amorphes Silizium | Solarzellen |
| A | ADMD-Name | X.400-Adressierung |
| A | Aktiva | BWL |
| A | Ampere | Stromstärke |
| a | Ar | Flächeneinheit |
| A | Arbeit | VWL |
| A | Österreich | Autokennzeichen |
| a.a.O. | am angegeben Ort | |
| a.F. | alte Fassung | |
| A/D | Analog/Digital | |
| AA | Auto Answer | |
| AAE | Allgemeine Anschalterlaubnis | Telekommunikation |
| AAL | ATM Adaption Layer | Netzwerke |
| AAP | Applications Access Point | DEC |
| AAP | Association of American Publishers | |
| AASP | ASCII Asynchronous Support Package | |
| AAT | Average Access Time | |
| AB | Allgemeine Bedingungen | Recht |
| AB | Anfangsbestand | BWL |
| AB | Anrufbeantworter | Allgemein |
| AB | Außenbeitrag | VWL |
| ABAP | Allgemeiner Berichts-Aufbereitungs-Prozessor | SAP R/2 |
| ABAP/4 | Advanced Business Application Language, Version 4 | SAP R/3 |
| ABB | ASEA Brown Boveri | Schweiz |
| Abb. | Abbildung | |
| ABC | Activity Based Costing | |
| ABC | American Broadcasting Company | |
| ABCS | Army Battle Command System | |
| ABEND | Abnormal End | |
| ABF | Applications By Forms | Ingres |
| ABG | Allgemeines Berggesetz | |
| ABI | Application Binary Interface | |
| ABIS | Autmatisches Rohkarosserien Oberflächeninspektionssystem | |
| ABlEG | Amtsblatt der Europäischen Gemeinschaften | |
| ABM | Asynchronous Balanced Mode | |
| ABN | Australian Bibliographic Network | |
| Abs. | Absatz | |
| Abschn. | Abschnitt | |
| ABT | Abort | |
| ABWL | Allgemeine Betriebswirtschaftslehre | |
| AbzG | Gesetz betreffend die Abzahlungsgeschäfte, Abzahlungsgesetz | |
| Ac | Actinium | Chemische Element |
| AC | Alternating Current | Elekrizität |
| ACA | Application Control Architecture | DEC |
| ACAE | Association des Constructeurs Eurpéens d' Automobiles | |
| ACAS | Application Control Architecture Services | |
| ACC | Accumulator | |
| ACC | Area Communication Controller | |
| ACD | Automatic Call Distribution | Informatik, Call-Center |
| ACDI | Asynchronous Communication Device Interface | |
| ACDP | Australian Committee on Data Processing | |
| ACE | Automatic Calling Equipment | |
| ACE | Advanced Computing | |
| ACF | Advanced Communication Function | |
| ACF | Access Control Field | |
| ACH | Automated Clearing House | |
| ACIAS | Automated Calibration Internal Analysis System | |
| ACID | Atomicity, Consistency, Isolation, Durability | |
| ACIS | American Committee for Interoperable Systems | |
| ACK | Acknowledge | |
| ACL | Access Control List | |
| ACM | Association for Computing Machinery | |
| ACMS | Application Control Management System | |
| ACONET | Akademisches Computer-Netz, Österrreich | |
| ACP | Automatic Channel Programming | |
| ACP | Auxiliary Control Process | |
| ACROSS | Automated Cargo Release and Operations Service System | |
| ACS | Asynchronous Communication Server | |
| ACS | Access Control System | |
| ACSE | Association Control Service Element/Entity | |
| ACSnet | Australian Computer Science Network | |
| ACTV | Advanced Compatible Television | |
| ACU | Automatic Calling Unit | |
| ADA | Automatic Data Acquisition | |
| ADAC | Allgemeiner Deutscher Automobil Club | |
| AdaIC | Ada Information Clearinghouse | |
| ADC | Adaptive Data Compression | |
| ADCCP | Advanced Data Communication Control Procedure | |
| ADD | Adapter Device Driver | |
| ADE | Application Development Environment | |
| ADF | Automatic Document Feed | |
| ADI | Agence de l'Informatique | |
| ADI | AutoCad Device Interface | |
| ADL | Address Data Latch | |
| ADL | Adventure Definition Language | |
| ADLAT | Adaptive Lattice Filter | |
| ADM | Application Development Modul, Asynchronous | |
| ADMD | Administration Management Domains | X.400, Öffentliche Management Domains |
| ADN | Allgemeiner Deutscher Nachrichtendienst | |
| ADP | Automatic Data Processing | |
| ADPCM | Adaptive Delta/Differential Pulse Code Modulation | |
| ADR | Address | |
| ADR | American Depository Receipt | Finanzmarkt |
| ADRC | Adaptive Dynamic Range Coding | |
| ADS | Application Development System | |
| ADS | Automatic Distribution System | |
| ADSC | Address Status Changed | |
| ADSP | AppleTalk Data Stream Protocol | |
| ADSR | Attack, Decay, Sustain, Release | |
| ADT | Abstrakter Datentyp | |
| ADT | Application Data Type | |
| ADTV | Advanced Definition Television | |
| ADU | Automatic Dialing Unit | |
| ADW | Application Development Workbench | KnowledgeWare Inc. |
| ADxVerz | Amtliches Verzeichnis der DATEX-Teilnehmer | |
| AE | Anwendungsentwicklung | |
| AEA | Association of European Airlines | |
| AEB | Analogue Expansion Bus | |
| AEC | Architectural and Engineering Construction | |
| AECOM | Asociatión Española de Codificatión de Mensajes | |
| AED | Abfrageeinrichtung für Datenverkehr | |
| AEEC | Airlines Engineering Electronics Committee | |
| AEG | Allgemeine Elektizitätsgesellschaft | |
| AEIOUS | Advanced Enhanced Interface for Open Universal Systems | |
| AES | Application Environment Services | |
| AET | Advanced Educational Technology | |
| AF | Auxiliary Carry Flag | |
| AfA | Absetzung für Abnutzung | BWL |
| AfaA | Absetzung für außergewöhnliche Abnutzung | BWL |
| AFAIK | As Far As I Know | Slang |
| AFC | Automatic Font Change | |
| AFD | Automatic File Distribution | |
| AFII | Association for Font Information Interchange | |
| AFJ | April Fool's Joke | Slang |
| AFN | American Forces Network | |
| AFNOR | Association Francaise de Normalisation | |
| AFP | AppleTalk Filing Protocol | |
| AfP | Archiv für Pressrecht | Zeitschrift |
| AFP | Advanced Function Printing | |
| AFS | Alex/Andrew File System | |
| AFS | Advanced Freephone Service | |
| AFSK | Audio Frequency Shift Keyer/Keying | Modulation |
| aFTP | Anonymous FTP | Internet |
| AFUU | Association Francaise des Utilisateurs d'UNIX | |
| AG | Amtsgericht | |
| AG | Aktiengesellschaft | |
| Ag | Silber | Chemische Element |
| AGC | Automatic Gain Control | |
| AGCS | Advanced Graphic Chip Set | |
| AGDX | Arbeitsgemeinschaft DX e. V., Erlangen | |
| Agfa | Aktiengesellschaft für Anilinfarbenherstellung | |
| AGFMB | Arbeitsgemeinschaft Freier Mailboxen | |
| AGP | Advanced Graphics Package | HP |
| AGTIVE | Applications of Graph Transformations with Industrial Relevance | Konferenz |
| AGV | Automatic Guided Vehicle | |
| AgV | Arbeitsgemeinschaft der Verbraucherverbände | |
| AHDL | Altera Hardware Description Language | |
| AHK | Anschaffungs- und Herstellkosten | BWL |
| AI | Artificial Intelligence | |
| AI | Analog Input | |
| AIA | Application Integrated Architecture | DEC |
| AIAG | Automative Industry Action Group | |
| AIBD | Association of International Bond Dealers | |
| AICPA | American Institute of Certified Accountants | |
| AIDA | Attention, Interest, Desire, Action | |
| AIDS | Acquired Immuno Deficiency Syndrome | |
| AIIM | Association for Information and Image Management | |
| AIM | Advanced Informatics in Medicine | |
| AIPS | Astronomical Image Processing System | |
| AISB | Association of Imaging Service Bureaus | |
| AISP | Association of Information Systems Professionals | |
| AIX | Advanced Interactive Executive | IBM |
| AK | Anschaffungskosten | BWL |
| AKA | Also Known As | |
| Akku | Akkumulator, Stromspeicher | |
| AktG | Aktiengesetz | |
| AL | Application Layer | |
| Al | Aluminium | Chemisches Element |
| AL | Arbeitslose | VWL |
| ALA | American Library Association | |
| ALC | Arithmetic and Logic Circuit | |
| ALC | Automatic Level Control | |
| ALE | Address Latch Enable | |
| ALEX | Automatic Login Executor | |
| ALGOL | Algorithmic Language | |
| ALI | Automatic Link Intelligence | |
| ALM | Application Loadable Modul | |
| ALQ | Arbeitslosenquote | VWL |
| ALT | Alternate | |
| ALU | Arithmetic Logic/Logical Unit | |
| ALU | Arbeitslosenunterstützung | |
| ALU | Arithmetic Logic Unit, Arithmetisch-logische Einheit | |
| ALV | Arbeitslosenversicherung | |
| AM | Amplitudenmodulation | |
| Am | Americium | Chemisches Element |
| AMANDDA | Automated Messaging and Directory Assistance | |
| AMD | Active Matrix Display | |
| AMD | Advanced Micro Devices, Inc., USA | |
| AMH | Automated Materials Handling | |
| AMMA | Advanced Memory Management Architecture | |
| AMO | Administration and Maintenance Order | |
| AMS | Andrew Message System | |
| Amtor | Amateur microcomputer teleprinting over radio | |
| AMTRAS | Agent Mediated Trading System | Informatik, Finanzmarkt |
| ANAC | Automatic Number Announcement Circuit | |
| ANI | Automatic Number Identification | |
| ANL | Automatic Noise Limiter | |
| Anm. | Anmerkung | |
| ANR | Automatic Network Routing | |
| ANSA | Advances Network Systems Architecture | |
| ANSI | American National Standards Institute | |
| ANTC | Advanced Networking Test Center | |
| ANW | International Academic Networking Workshop | |
| AO | Analogue Output | |
| AO | Abgabenordnung | |
| AOE | Application Operating Environment | AT&T |
| AOL | America Online | |
| AOL | America Online | |
| AOS | Add Or Subtract | |
| AOW | Asia and Oceania Workshop | OSI |
| AP | Application/Adjunct Processor | |
| APA | All Points Addressable, Adaptive Packet Assembly, | |
| APAR | Authorized Program Analysis Report | IBM |
| APAREN | Address Parity Enable | |
| APC | Application Protocol | |
| APC | Association for Progressive | |
| APCUA | Association of PC Users Groups | |
| APG | Automated Password Generator | |
| API | Application Program/Programming Interface | |
| APIA | Application Program Interface Association | |
| APL | A Programming Language | |
| APL | Application Programm Library | |
| APM | Advanced Power Management | |
| APP | Application Portability Profile | |
| APPC | Advanced Program-to-Program Communcation | SNA |
| APPI | Advanced Peer-to-Peer Internetworking | |
| APPN | Advanced Peer-to-Peer Networking | IBM |
| APS | Advanced Production System | |
| APS | Automatic Position Select, | |
| APSE | Ada Project Support Environment | |
| APT | Address Pass Through | |
| APT | Automatically Programmed Tools | |
| Ar | Argon | Chemisches Element |
| ARA | AppleTalk Remote Access | |
| ARAP | Aktive Rechungsabgrenzungsposten | BWL |
| ARB | Allgemeine Versicherungsbedingungen für die Rechtsschutzversicherung | |
| ArbZG | Arbeitszeitgesetz | |
| ARCA | Advanced RISC Computing Architecture | |
| ARCNET | Attached Resource Computing Network | |
| ARD | Arbeitsgemeinschaft der öffentlich-rechtlichen Rundfunkgesellschaften der BRD | |
| ARL | Adjusted Ring Length | |
| ARLL | Advanced Run Length Limited | |
| ARM | Asynchronous Response Mode | |
| ARM | ARPANET Reference Model, | |
| ARMA | Association of Record Managers and Administrators, USA | |
| ARMM | Automated Retroactive Minimal Moderation | |
| ARNS | AppleTalk Remote Network Server | |
| ARP | Address Resolution Protocol | TCP/IP |
| ARPA | Advanced Research Projects Agency, USA | |
| ARPL | Adjust Requested Privilege Level | |
| ARQ | Automatic Request | |
| ARQ | Automatic Repeat on Request | |
| ARRL | American Radio Relay League | |
| ARS | Adaptive Rate System | |
| Art. | Artikel | |
| ARTIC | A Real-Time Interface Coprocessor | IBM |
| ARU | Audio Response Unit | |
| As | Arsen | Chemisches Element |
| AS3AP | ANSI SQL Standard Scalable and Portable | |
| ASA | American Standards Association | |
| ASAP | Automatic Switching And Processing, | |
| ASC | Accredited Standards Committee | ANSI |
| ASCII | American Standard Code for Information Interchange | |
| ASEA | Allmänna Svenska Electricitets-Aktiebolag, Schweden | |
| ASF | Automatic System Facility | Datenbanken |
| ASIC | Application Specific Integrated Circuit | |
| ASIT | Advanced Security and Identification Technology | |
| ASK | Akademische Software Kooperation, Karlsruhe, | |
| ASL | Adaptive Speed Levelling | |
| ASL | Architectural Space Laboratory, Z"urich | |
| ASM | Application Specific Memory | |
| ASN.1 | Abstract Syntax Notation One | ISO, CCITT |
| ASO | Active sideband Optimum | |
| ASP | Active Server Pages | Microsoft |
| ASP | AppleTalk Session Protocol | |
| ASP | Association of Shareware Professionals | |
| ASPEC | Adaptive Spectral Perceptual Entropy Encoding | |
| ASPI | Advanced SCSI Programming Interface | |
| ASPS | Advanced Signal Processing System | |
| ASQF | Arbeitskreis Software Qualität Franken e.V. | |
| ASR | Automatic Send Receive | |
| ASR | Ada Software Repository, | |
| AStG | Außensteuergesetz | |
| ASU | Asynchron/Synchron-Umsetzer | |
| AT | Atomic Time | |
| AT | Advanced Technology | |
| AT | Attention | Hayes |
| At | Astat | Chemisches Element |
| AT&S | Austria Technologie & Systemtechnik | |
| AT&T | American Telephone & Telegraph Company | |
| ATA | AT Bus Attachment | |
| ATC | Address Translation Cache | |
| ATDM | Asynchronous Time Division Multiplexing | |
| ATDMA | Asynchronous Time Division Multiple Access | |
| ATE | Automated/Automatic Testing Equipment | |
| ATFSM | Ask The Friendly System Manager | Slang |
| ATIS | A Tools Integration Standard | |
| ATK | Andrew Toolkit | |
| ATL | Address Translation Cache | |
| ATM | Asynchronous Transfer Mode | |
| ATM | Adobe Typeface Manager | |
| ATP | AppleTalk Transaction Protocol | |
| ATP | Available to Promise | |
| ATR | Automatic Terminal Recognition | |
| ATS | Apple Terminal Services, Administrative Terminal System | |
| AU | Arithmetic Unit, Access Unit | |
| Au | Gold | Chemisches Element |
| AUDIT | Automated/Automatic Data Input Terminal | |
| AUE | Andrew User Environment | |
| Aufl. | Auflage | |
| AUGE | Apple User Group Europe | |
| AUI | Attachment Unit Interface | Ethernet |
| AUP | Appropriate Use Policy | Internet |
| AuslInvG | Auslandsinvesitionsgesetz | |
| AUTEX | Automatische Telex- und Teletexauskunft der DBP | |
| AUX | Auxiliary | |
| AV | Anlagevermögen | BWL |
| AVA | Audio Visual Authoring | IBM |
| AVC | Audio Visual Connection | IBM |
| AVCD | Audio Visual Computer Display | |
| AvD | Automobilclub von Deutschland | |
| AVerzTxTtx | Amtliches Telex- und Teletexverzeichnis der DBP | |
| AVG | Average | |
| AVG | Angestellterversicherungsgesetz | |
| AVI | Audio Visual Interleaved | Microsoft |
| AVL | Adelson Velskii Landis | Suchbäume |
| AVON | Amtliches Verzeichnis der Ortsnetze | |
| AWA | Administrative Wertanalyse | BWL |
| AWADO | Automatischer Wechselschalter in der Anschlußdose | |
| AWD | Automatische Wähleinrichtung für Datenverbindungen | |
| AWF | Ausschuß für Wirtschaftliche Fertigung | |
| AWG | American Wire Gauge | |
| AWK | Aho, Weinberger, Kernighan | |
| AWL | Anweisungsliste | DIN 19 239 |
| AWV | Ausschuß für wirtschaftliche Verwaltung in Wirtschaft und öffentlicher Hand e.V. | |
| AX | Automatic Transmission | |
| AXE | Applications Execution Environment | |
| AZ | Azimut | |
| AZ | Arbeitszeit | |
| AZO | Arbeitszeitordnung | |