CADD & PLM
I've spent a long time in this field--more than 30 years--so I am entitled to say with authority: This is cool stuff!

Sites abound with current CADD, and some PLM, info; CADwire.net is one I'm involved in, but you can find many others through any search engine. Here you will find my personal observations and links. Please participate in the community history project; email me anything you want to offer for it.