The Visual LISP Developer's Bible - 2003 Edition

Autodesk purchased the full rights to Vital LISP during the late stages of AutoCAD R14 and renamed it Visual LISP. It was then available as a separate add-on to AutoCAD R14. With the release of AutoCAD 2000, Visual LISP replaced the older Proteus AutoLISP interpreter module and became an integral part of AutoCAD. ................
................