Why AutoCAD uses Lisp as extension/scripting language

The following links provide historic information on AutoLISP:

1. Why Lisp? from The Autodesk File


2. The AutoLISP Wikipedia entry


3. Introduction to AutoLISP

I always wanted to know why Lisp was used as the scripting/extension language of AutoCAD. Mainly because Lisp may be perceived as a Computer Science only language.