[bachmeier]

I'll just point out that R started as a Scheme dialect. If you dig into the source, you'll see that the main C data structure is the SEXP, for s-expression. And as the other comment says, you can call everything as a function. You can write an s-expression form of R in about 30 minutes. Literally all you have to do is identify opening and closing parens and rewrite in `function`(arguments) form.

[rackjack]

Ooooooh wow, I remember digging into R internals a while ago for something and seeing `sexp`, and only NOW am I connecting it to Lisp's SEXP!! That makes so much sense!

Does RData derive from LISP images? Because if so, that'd be quite the revelation to me.

[CornCobs]

RData only stores the environment of the session. It doesn't store the current search path (you need to reload libraries). I believe it's not a full binary image like LISP