Lars> With Common Lisp one gets a language environment that is Lars> reasonably standard -- you can expect books like CLtL2, Lars> commercial environments like Allegro, free environments like Lars> CLISP, and (oh, joy of joys) an Emacs that one would know how to Lars> use if one was familiar with any of the others. Michael> Problem is, that, as far as I can see, none of the free Michael> implementations actually cover the standard. Perhaps, but how close do we really need to be? I find CLISP more than close enough for what I want to do. And it is getting closer everyday. Ray