OK, the history teacher didn't show up,
He's still getting over caring for his 2yo grandson all day Thursday!
Brian Hunter invented an add on to AutoCAD and called it APDesign.><snip><
Originally it was called AutoPlan . . . . .
Someone correct me if I'm wrong but I've been led to believe that Env was also his brainchild.
About time Cadsoft included some of their history on aboutus.html