Microsoft has released the complete source code for Microsoft BASIC for 6502 Version 1.1, the 1978 interpreter that powered early personal computers like the Commodore PET, VIC-20, Commodore 64, and Apple II. The 6,955 lines of assembly language code have been posted to GitHub under an MIT license, allowing anyone to freely use, modify, and distribute the code that helped launch the personal computer revolution. This historic release provides a fascinating glimpse into the early days of personal computing and the foundational software that made it accessible to millions.