Interlisp-D was more image based. You could type something in to the repl then add it to a file later. There was a structure editor that worked on the s-expre

Interlisp-D was more image based. You could type something in to the repl then add it to a file later. There was a structure editor that worked on the s-expression of a function, including any comments as they were represented as a special form within that structure. (* This is a comment) See section 7 of the introductory guide [1]. [1] https://www.mirrorservice.org/sites/www.bitsavers.org/pdf/xerox/interlisp-d/199202_Medley_2.0/An_Introduction_to_Medley_Release_2.0_Feb92.pdf https://www.mirrorservice.org/sites/www.bitsavers.org/pdf/xe...