Microsoft QuickBASIC 1.00
Released in 1985 by Microsoft
For DOS

Microsoft QuickBasic, not to be confused with the lesser QBasic, was
a Basic interpreter and compiler product loosely based on GW-Basic.
Version 2.0 for DOS and later included an Integrated Development
Environment. Microsoft also produced QuickPascal and QuickC with
similar integrated environments.

QuickBASIC was positioned as an entry level for their BASIC
Professional Development System, and competed against language
products targeted at hobbyists, such as those from Borland.

Version 1.0 for DOS, released in 1985, does not have an integrated
editor, and was considered rather buggy.

Source:
https://www.pcjs.org/disks/pcx86/tools/microsoft/basic/quickbasic/1.00/
