A control packet used to acknowledge the receipt of data or control packets in communication systems.
An Acknowledgment is a declaration by a person who has signed a document that such signature is a voluntary act, made before a duly authorized person. It is often done before a Notary Public.
An IOU (phonetic abbreviation of 'I owe you') is a signed document that acknowledges debt and agrees on payment, often specifying the amount owed.
