Ask HN: What Were the Differences Between Symbolics Genera and Xerox Interlisp-D 5 by linguae | 1 comments on Hacker News. I have experience with Scheme, Racket, and Common Lisp, including teaching undergraduate-level courses on programming language paradigms and principles. I am also an avid reader of programming language literature, and for years I've been impressed with what I've read about the Lisp machines of the 1980s, as well as projects inspired by them such as Apple's work on Newton (which started as a Lisp project until John Sculley made an executive decision to have C++ be the implementation language), SK8, and Dylan in the 1990s. However, having being born in the late 1980s, I never got to use a Lisp machine, and the only one I've seen is the LMI-LAMBDA machine in the Computer History Museum in Mountain View, CA. There's a lot of nostalgia, mystique, and praise surrounding the Symbolics Genera operating system, especially its development environment, ...