33 1/3 replaced by the 45. It's time.
On this day in history:
Paine's "Common Sense" was published today in 1776.
RCA introduces 45 RPM record (1949)
Order of Golden Fleece established in Austria-Hungary & Spain (1429)
Rockefeller incorporates Standard Oil (1870).
UN General Assembly meets for 1st time in London (1946).
UN HQ opens in Manhattan (1951)