Look up ACK, ack, ack., or ␆ in Wiktionary, the free dictionary.

ACK or Ack may refer to:

• Amar Chitra Katha, an Indian comic book series

• Acknowledgement (data networks)
  • ACK (TCP), the control character used in the Transmission Control Protocol to acknowledge receipt of a packet
• Amsterdam Compiler Kit, a retargetable compiler suite and toolchain

• Acklington railway station (Station code: ACK), a rail station in the UK
• Armstrong Whitworth F.K.8, an early aircraft known as the "Big Ack"
• Nantucket Airlines or ACK Air, an American airline
• Nantucket Memorial Airport (IATA: ACK, FAA LID: ACK), an airport in the US

• Assumption College, Kilmore, an Australian school
• Aka-Kora language (ISO 639-3: ack), an extinct Great Andamanese language
• TNK2 or ACK or ACK1, an enzyme that in humans is encoded by the TNK2 gene

• Ack Ack (disambiguation)
• Acknowledgment (disambiguation)

This disambiguation page lists articles associated with the title ACK.
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