| A# | — | 2004 | GNAT |
| A+ | array programming | 1988 | Morgan Stanley |
| ABAP | structured programming, object-oriented programming, imperative programming | 1983 | SAP |
| ABasiC | — | — | MetaComCo |
| Abbreviated Language For Authorization | declarative programming | — | — |
| Abbreviated Test Language for All Systems | multi-paradigm programming | 1983 | Institute of Electrical and Electronics Engineers |
| ABC | procedural programming, structured programming, imperative programming | 1975 | Centrum Wiskunde & Informatica |
| Abstract State Machine Language | functional programming | — | — |
| ABSYS | logic programming, declarative programming | 1967 | — |
| Accent | — | 1990 | — |
| ACL2 | functional programming | 1990 | Matt Kaufmann |
| Acorn System BASIC | — | — | Acorn Computers |
| Action! | procedural programming | 1983 | Optimized Systems Software |
| ActionScript | prototype-based programming, object-oriented programming, functional programming, imperative programming | 1998 | Macromedia |
| Active Oberon | — | 1997 | — |
| Active Server Pages | — | 1996 | Microsoft |
| ActiveVFP | object-oriented programming, procedural programming | 2001 | — |
| Actor-Based Concurrent Language | — | — | — |
| ACUCOBOL | object-oriented programming | 1988 | — |
| Ada | structured programming, object-oriented programming, multi-paradigm programming, imperative programming | 1980 | Jean Ichbiah, S. Tucker Taft |
| Ada 2005 | — | 2007 | — |
| Ada 2012 | — | 2012 | — |
| Ada 83 | — | 1983 | — |
| Ada 95 | — | 1994 | — |
| Address programming language | — | 1955 | Kateryna Yushchenko |
| ADMB | — | — | — |
| Advanced Business Application Language | declarative programming, procedural programming | — | — |
| AdvPL | — | 1994 | — |
| AEGIS (SIEM platform) | — | — | CAI Technology |
| Agda | purely functional programming | 2007 | Chalmers University of Technology |
| AgentCubes | object-oriented programming | — | — |
| AgentSheets | object-oriented programming | 1991 | — |
| AgentSpeak | agent-oriented programming | — | — |
| Agora | object-oriented programming, reflective programming, prototype-based programming | — | Wolfgang De Meuter |
| Aheui | — | — | Puzzlet Chung |
| AIMACO | imperative programming | — | — |
| AIMMS | — | 1989 | — |
| AiScript | — | — | — |
| AL | imperative programming | — | Microsoft |
| Aldor | logic programming, functional programming, imperative programming, object-oriented programming | 1990 | IBM Thomas J. Watson Research Center |
| Alef | concurrent computing, structured programming | 2010 | — |
| ALGAE | — | 1951 | — |
| Algebraic Logic Functional programming language | logic programming, functional programming | — | — |
| Algek | — | — | — |
| ALGO | — | 1961 | Bendix Corporation |
| ALGOL | structured programming, procedural programming, imperative programming | 1959 | — |
| ALGOL 58 | imperative programming, structured programming, procedural programming | — | Klaus Samelson, Heinz Rutishauser, Charles Katz, Friedrich L. Bauer, Alan Perlis, John Backus |
| ALGOL 60 | procedural programming, structured programming, imperative programming | — | Peter Naur, Adriaan van Wijngaarden, Klaus Samelson, John Backus, John McCarthy, Heinz Rutishauser, Charles Katz, Bernard Vauquois, Alan Perlis, Friedrich L. Bauer |
| ALGOL 68 | imperative programming, concurrent computing | — | Adriaan van Wijngaarden, John E. L. Peck, Cornelis H. A. Koster, Barry J. Mailloux |
| ALGOL 68C | — | 1970 | Stephen R. Bourne |
| ALGOL W | structured programming, procedural programming, imperative programming | 1966 | Tony Hoare, Niklaus Wirth |
| Alice | constraint programming, imperative programming, functional programming, concurrent computing | 2000 | Saarland University |
| Alice | — | 1995 | Carnegie Mellon University |
| Alkhawarizm | — | — | — |
| Allegro Common Lisp | object-oriented programming | — | — |
| Alma-0 | constraint programming, logic programming, imperative programming, procedural programming | 1997 | Centrum Wiskunde & Informatica |
| ALMIR-65 | — | 1965 | — |
| Alore | — | — | — |
| Alpaca | functional programming | — | — |
| Altair BASIC | — | 1975 | Bill Gates, Paul Allen |
| ALTRAN | — | 1965 | Bell Telephone Laboratories |
| Alusus | — | — | — |
| Amazon Shading Language | — | — | — |
| Amber | — | — | — |
| AmbientTalk | reflective programming, concurrent computing, prototype-based programming, object-oriented programming, event-driven programming | 2006 | — |
| AmiBlitz | — | — | — |
| Amiga Basic | — | — | Microsoft, MetaComCo |
| Amiga E | object-oriented programming | 1993 | Wouter van Oortmerssen |
| AMOS | procedural programming, imperative programming | 1990 | François Lionet |
| Ampersand | — | — | Jason Kerama |
| AMPL | declarative programming, imperative programming | 1985 | Bell Labs |
| AMPLE | — | — | — |
| Analitik | — | 1968 | Viktor Glushkov, Glushkov Institute of Cybernetics, National University «Yuri Kondratyuk Poltava Polytechnic» |
| Analytica | array programming | 1992 | — |
| AngelScript | imperative programming, procedural programming, object-oriented programming | 2003 | — |
| ANSYS Parametric Design Language | — | 1970 | — |
| Apache Ant | — | 2000 | Apache Software Foundation |
| Apache Groovy | object-oriented programming, multi-paradigm programming, imperative programming, functional programming | 2003 | Java Community Process, Apache Software Foundation |
| Apex | object-oriented programming | 2007 | Salesforce |
| APL | array programming, structured programming, functional programming, modular programming | 1966 | IBM, Lawrence M. Breed, Kenneth E. Iverson |
| APLX | — | — | — |
| Apple Dylan | — | — | — |
| AppleScript | natural-language programming | 1993 | Apple Inc. |
| Applesoft BASIC | — | 1977 | Microsoft |
| April APL | — | — | — |
| AQASM | — | 2017 | Atos SE |
| Arc | metaprogramming, procedural programming, functional programming | 2008 | Paul Graham |
| Arduino | functional programming, procedural programming | — | Massimo Banzi |
| ARexx | — | 1987 | — |
| Argh! | — | — | — |
| Argus | — | — | Maurice Herlihy, Bob Scheifler, Barbara Liskov |
| ARITH-MATIC | — | 1954 | Grace Hopper |
| ArkTS | — | — | Huawei |
| ARM NEON | — | — | — |
| Armada | — | — | — |
| Artemis | — | — | — |
| ARTEMIS (pentest platform) | — | — | CAI Technology |
| ASCEND | declarative programming | — | — |
| ASIC | — | — | — |
| Asm.js | — | — | — |
| AspectC++ | aspect-oriented programming | — | — |
| AspectJ | aspect-oriented programming | 2001 | Eclipse Foundation |
| Assembly language | non-structured programming | 1949 | — |
| AssemblyScript | — | — | — |
| ASSIRIS | imperative programming | 1966 | CII, Institut National de Recherche en Informatique et en Automatique |
| Astek | — | — | — |
| Asymptote | imperative programming | 2004 | — |
| Atari BASIC | — | 1979 | Shepardson Microsystems |
| Atari Microsoft BASIC | — | 1982 | Atari, Inc. |
| Atari ST BASIC | — | 1985 | MetaComCo |
| Ateji PX | object-oriented programming | — | — |
| Atlas Autocode | — | 1965 | — |
| ATLAS Transformation Language | — | — | — |
| Atom | functional programming, declarative programming | 2007 | — |
| ATS | declarative programming, functional programming | 2006 | Boston University |
| AtScript | — | — | — |
| Austral | systems programming | — | — |
| Autocode | — | 1952 | — |
| AutoHotkey | — | — | AutoHotkey Foundation LLC |
| AutoIt | object-oriented programming, imperative programming, functional programming, procedural programming, reflective programming | 1999 | — |
| AutoLISP | — | 1986 | — |
| AWK | procedural programming, data-driven programming | 1977 | Brian Kernighan, Peter J. Weinberger, Alfred Aho |
| Awra | — | — | Roman Leinwather |
| Axum | object-oriented programming | 2009 | Microsoft |
| Azure Bicep | — | — | Microsoft |
| A♯ | functional programming | 1971 | IBM Thomas J. Watson Research Center |