In case you missed it on WorldCAD Access, Dave Weisberg has released a history of CAD as a free book on-line. It is called The Engineering Design Revolution and subtitled The People, Companies and Computer Systems That Changed Forever the Practice of Engineering.
I don’t like regurgitating things from other blogs, but this is an exception for two reasons. First, I find it very interesting. Second, it’s in a good cause and deserves all the publicity it can get. Access to the book in PDF form is free, but Dave is asking for voluntary contributions to the Cancer League of Colorado Foundation.
I’ve skimmed through the Autodesk and AutoCAD chapter of the book, and while I was already familiar with much of the content that particular section and could pedantically quibble with its accuracy in a few places, I still found it highly informative and interesting.
You can find the book at www.cadhistory.net.