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Noun: IOU
  1. An informal debt instrument; representing 'I owe you'

Derived forms: IOUs

Type of: marker [N. Amer], note, note of hand, promissory note

Encyclopedia: IOU

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IoT
iota
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IOW
Iowa
Iowa crab
Iowa crab apple
Iowan
Ioway
IP
IP address
IPA
IPCC