"plus bas niveau", oui, car ils compilaient 'à la main'. tu peux lire l'histoire de lisp narrée par son papa, John McCarthy, ici : http://www-formal.stanford.edu/jmc [...] /lisp.html
< The implementation of LISP began in Fall 1958. The original idea was to produce a compiler, but this was considered a major undertaking, and we needed some experimenting in order to get good conventions for subroutine linking, stack handling and erasure. Therefore, we started by hand-compiling various functions into assembly language and writing subroutines to provide a LISP "environment". These included programs to read and print list structure. >