Lisp programmes

name one computer programme written in the lisp that people actualy use

On the systems in which Emacs was first implemented, Emacs often ran noticeably slower than rival text editors, because its Lisp-based design incurs a performance overhead resulting from loading and interpreting the Lisp code. Several joke backronyms allude to this: Eight Megabytes And Constantly Swapping (from the days when eight megabytes was a lot of memory), Emacs Makes A Computer Slow, Eventually Mallocs All Computer Storage, and Eventually Makes All Computers Sick. However, modern computers are fast enough that Emacs is seldom felt to be slow. In fact, Emacs starts up more quickly than most modern word processors.[citation needed] Handling large files on 32 bit systems is still a weak point for Emacs. Before version 23.2 Emacs could handle files up to around 256 MB; with 23.2 this was raised to around 512 MB. Even on 64 bit systems the limit of 512MB is only lifted in Emacs-24.[citation needed]