Ok

Ok

This is the most commonly used words and there is more controversy about its origin. One of the most popular theories say that during the American civil war, when troops returned to barracks without any floor, put on a big board Killed "0" (zero deaths). From this comes the expression "O.K." to say that all is well.

Another version is that it comes from the "OK club", wich in 1840 endorsed the reelection of U.S.

President Martin Van Buren, know as "Old Kinderhook" (born in kinderhook, New York)

However, it seems that the true origin lies in several articles in 1839 (years before the civil war and a year before the Club OK) in the Boston Post newspaper in which to call attention misspell OK as an abbreviation for -all correct-