IOU
From Wikipedia, the free encyclopedia.

An IOU is a promise of money, goods, services, or other items of value, and may be either written or verbal. An IOU is less formal than a contract, and is generally not held to be legally binding.

While it appears as an acronym, it is a homophone for I owe you.

The original article can be found at: http://en.wikipedia.org/wiki/IOU.
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