Did you realize that the compact disc debuted thirty years ago this week? PRI’s Marketplace ran a story on it this past Monday (audio archive available; fast-forward to 20 mins., 45 sec.), in which they interviewed some of the original Sony engineers and marketers who developed the format. There’s been surprisingly little media coverage of this landmark, though it’s admittedly not the stuff of parades or three-day weekends.

Speaking of public radio, music and technological history, NPR’s Morning Edition has a six-part series of reports called “TechnoPop,” looking at the invention of key music technologies. Don’t forget to donate to your local public radio station.