Though it would be good for people who are not familiar with Pentax brand to familiarize a little with it.
Tony did Canon and Nikon history recently, would be nice to see similar program on Pentax/Asahi as well. But for now, there are great articles out there.
Found the following - great kudos to Jonathan for such a nice observation of camera/mfctr history...
Wiki is good as well:
Pentax Forums had recently published good article on K mount specifically: