And now a page from our "Sunday Morning" Almanac: January 10th, 1949, 67 years ago today ... the day RCA Victor unveiled a new breed of phonograph record -- the 45. Just seven inches across, with a ...

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RCA Victor, in 1949, introduced the 45, which competed with the 12-inch 33-1/3 LP (Long Play), introduced by Columbia Records in 1948. The LP could hold more tunes and up to 30 minutes on each side.

Records and machines to play them on have been around for over 100 years. Mass-produced recorded music for the home began in the early 1900s with Thomas Edison's cylinder players. After a few short ...