Overview Interlisp-D (and the Medley version of it) were originally developed at the Xerox Palo Alto Research Center (PARC) in the 1970’s and 80’s. It was a software environment for rapid prototyping, research and Artificial Intelligence, combining the power of the Lisp language and system elements with the now common PARC-born Windows/Icon/Mouse/Pointer graphical user interface. The Medley Interlisp project was started in 2020 by a few of the original developers, focusing on reviving the softwa...