A fairy tale about 'O.K.'

A little-known fact about Martin Van Buren so that at least you take something away from today’s breakfast. He went on to become president, but that’s not so relevant. He contributed a word to the English language. And that word is what we use every day and that word is “O.K.” When Martin Van Buren was president and he wanted to get out of the White House he would put the initials O.K. on a memorandum and what it stood for was “Off to Kinderhook.” That is the derivation of the word O.K.

- NY Governor Spitzer

For the actual history of O.K see the following post on NYT;
A Spitzer Tale Is Not ‘Oll Korrect’