Tech History Made on January 10, 1949

On this day in 1949 the 45 record was introduced by RCA. The original record, the 78, was 10 inches in diameter and spun at 75 to 80 RPM. The 45 was only 7 inches in diameter but held the same amount of music as the 78 by spinning at a slower rotation of only 45 RPM. The 45 was cheaper to make and easier to take with you. Like the 78, it only had one song per side but became a popular medium for rock and roll. This is mostly due to the fact that it was cheaper than LP's or EP's, so all of the young fans could afford 45's. We solute you, 45, for helping millions rock.