| .NET framework | 2.PAK | 20-GATE | 473L Query | 51forth |
| A Hardware Programming Language | A Language Encouraging Program Hierarchy | A Language for Attributed Definitions | A Language with an Extensible Compiler | A Manufacturing Language |
| A PArse REquest Language | A Programming Language | A Simulation Process-Oriented Language | A# | A'UM |
| A-0 | A-language | ABC ALGOL | ABCL/1 | ABCL/R |
| ABCL/R2 | ABCL/c+ | ABLE | ABSET | ABSYS |
| ACOM | ACOS | ACT ONE | ACT++ | ADAPT |
| ADD 1 TO COBOL GIVING COBOL | ADELE | ADES | ADM | ADVSYS |
| AFAC | AGORA | AIDA | AIr MAterial COmmand compiler | ALADIN |
| ALAM | ALCOR | ALEF | ALEPH | ALGEBRAIC |
| ALGOL 58 | ALGOL 60 | ALGOL 60 Modified | ALGOL 60 Revised | ALGOL 68 |
| ALGOL 68 Revised | ALGOL 68-R | ALGOL 68C | ALGOL 68RS | ALGOL 68S |
| ALGOL C | ALGOL D | ALGOL N | ALGOL W | ALGOL X |
| ALGOL Y | ALGY | ALLOY | ALP | ALPHA |
| ALPS | ALTAC | ALTRAN | ALgorIthmic ASsembly language | ALgorithm DEScription |
| AMBIT | AMBIT/G | AMBIT/L | AMBIT/S | AMBUSH |
| AML/E | AMPL | AMPLE | ANCP | ANNotated Ada |
