Although Microsoft did not invent BASIC, their founding product was a BASIC interpreter for the Altair computer. The descendants below includes Microsoft's BASIC-80 (MBASIC), BASIC-86 (pre-GWBasic), BASIC for Mac, BASIC Compiler 86/88, Basic Compiler for Mac, and Professional Development System 7.x. IBM Personal Computer Basic Compiler, GW-BASIC, QuickBasic, and Visual Basic are listed separately.
Basic 286 for Xenix
| Download name | Version | Language | Architecture | File size | Downloads | 
|---|---|---|---|---|---|
|  Microsoft BASIC 5.41 for Xenix (5.25-360k) | 5.41 for Xenix | English |   | 179.86KB | 5 | 
|  Microsoft Basic Compiler 5.70 for Xenix 286 (5.25-360k) | 5.70 for Xenix 286 | English |   | 5MB | 5 |