Might be of interest: https://fossbytes.com/apples-lisa-operating-system-free-open-source-release/ More than three decades ago, Apple unveiled the Apple Lisa. It turned out to be one of the biggest flops of Apple, selling only 10,000 units; Apple spent a mammoth $150 million on R&D. Lisa, one of the first commercial computers with a GUI, also set the stage for a conflict between CEO John Sculley and Cofounder Steve Jobs. For those who don’t know, LISA stood for Local Integrated System Architecture. This doesn’t mean that Lisa’s pioneering operating system is completely dead. Soon, in 2018, the Computer History Museum will be open sourcing the code of the Apple Lisa operating system, and you’d be able to download it for free, according to Business Insider.