Ack

[Sonia]

a human onomatopoeic(sound)word to describe frustration or disgust.

[Becky]

In the TCP protocol, the receiving computer sends an ACK (acknowledgment) to the sending computer. This is basically how a coonection is established.

[Britney]

airport call letters for Nantucket Memorial Airport.
Common abreviation for anything Nantucket.

[Mark Zuckerberg]

Nerdspeak for yes or I hear you
Usu. used on [IM] by programmers

[Luis Fok]

ACK is the call letters for Nantucket Airport, and thus ACK = Nantucket.

[Jason Yan]

The call letters for Nantucket Airport.
duh.

[Justin Bieber]

the airport call signal for nantucket...like you know, JFK or LAX