Kodak failure case study. There are a bunch of film companies but none as large as Kodak back in the day. I included this information because I used to live in Rochester, NY. Kodak and Xerox were both really important to so many people back in the day. Unfortunately, Kodak went bankrupt and is now only a shell of its' former self.
I remember my friend's family owned this technology. Even cooler was the LaserDisc of the complete Steelers super bowl game! This was back in the early eighties.
Wikipedia does a good job in describing recording media which makes recording possible.
Origins of Sound Recording: The Inventors - Thomas Edison National Historical Park (U.S. National Park Service)
November 11, 1951...First Video Image From Magnetic Tape - Eyes Of A Generation...Television's Living History
Everything you can ever want to know about this groundbreaking invention.
Video of a vintage reel to reel recorder. My parents owned a recorder quite similar to this recorder. This recorder still contains the sound of my voice and my brother's voice from some point in the mid 70s.