http://www.softwarepreservation.org/projects/LISP/interlisp_...
Then follow up with "The Interlisp Programming Environment"
https://www.computer.org/csdl/magazine/co/1981/04/01667317/1...
"Graphical Programming in Interlisp-D"
https://www.youtube.com/watch?v=wlN0hHLZL8c
"Eric Bier Demonstrates Cedar"
https://www.youtube.com/watch?v=z_dt7NG38V4
Cedar was the very first graphical workstation for something like .NET and Java would later kind of try to become.
Because
[1] https://interlisp.org/
&
[2] https://github.com/interlisp
Because
[1] https://interlisp.org/
&
[2] https://github.com/interlisp