The 45 RPM record was introduced to the general public on this day, January 10, 1949.

For year, teens had to endure their parents' interminable LP (album) record playing.  Mostly show tunes or soundtracks or "background elevator music."  Now, with the advent of the 45 (by RCA Records), kids could actually by one song that they liked (known as a "single") and create their own record library.

The 45 changer, the little plastic doohicky that allowed us to play our "big holed" 45 on the little spindle that held the "small hole" LP was also introduced on this day.