Like so many other technologies, it's tough to pin down an exact birthday for the compact disc. If we're tracing things back to the world of LaserDisc as a potential commercial product, we're talking years or decades earlier. As far as laboratory testing is concerned for the tech as we've come to know, love and subsequently abandon, the we're going back to the mid-70s in our journey. For the sake of simplicity, let's go with the first commercial recor
