MICROSOFT GOES BACK TO BASIC, OPEN-SOURCES BILL GATES' CODE

Summary from the TLDR Web Dev newsletter

Microsoft has open-sourced the original Microsoft BASIC for the 6502 Version 1.1, a foundational piece of software written by Bill Gates and Ric Weiland. This influential code has 6,955 lines of assembly language and powered early personal computers like the Commodore and Atari.