what you all should realised is that LISPS is a programming lang just as c++ and java and thus will run on any computer as long as its compiler is available on the system. autocacad is a cad system that was written on the autolisps prog. lang, a strain of lisps and thus autocad has a lisps compiler in it. this is why lisps software can be run within autocad. LISPS softwares are good in the design of artificial intelligent softwares.