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ACK

1. /ak/ The mnemonic for the ACKnowledge character, ASCII code 6.

2. A message transmitted to indicate that some data has been received correctly.

Typically, if the sender does not receive the ACK message after some predetermined time, or receives a NAK, the original data will be sent again.

[Jargon File]

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ACF ACF/NCP ACIA ACID ACIS	0/1 knapsack problem 100BaseVG 32-bit application 386BSD 5th Glove	ACL ACM ACME ACOM Acorn Archimedes