Carina Sweet at The Computer History Museum:
Mountain View, CA – Jan. 19, 2023: The Computer History Museum (CHM), the leading museum exploring the history of computing and its impact on the human experience, today announced the public release and long-term preservation of the source code for the Apple Lisa, including its system and applications software, as part of its Art of Code series. Forty years ago today, Apple, Inc. released the Lisa computer, a milestone in computing history for its innovative use of a graphical user interface (GUI) in a personal computer (PC).
The source code can be downloaded here as a 7.2 MB zipped archive.