OK, is Martin Van Buren responsible for the tiny word that punches above its weight?

From Buenos Aires to Bangkok, Montreal to Moscow, the languages may differ, but nearly every taxi driver or street vendor in the world understands one word made famous during a raucous U.S. presidential campaign nearly 200 years ago.

It's "OK": a tiny word that punches well above its weight. It means both "yes" and "I understand." It's a noun: I got the OK for this story from my editor; a verb: She OK'd it and an adjective: The story turned out OK.

It's even a simple interjection: OK! Enough with the grammar lesson!

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