What does ACK stand for?

What does ACK mean?

ACK	ACKnowledge Computing » Networking
ACK	Acknowledgment Computing » Drivers
ACK	ACKnowledgment Computing » Telecom
ACK	Arbeitsgemeinschaft Christlicher Kirchen Community » Religion
ACK	Anglican Church of Kenya Community » Religion
ACK	Armstrong World Industries, Inc. Business » NYSE Symbols
ACK	Nantucket, Massachusetts USA Regional » Airport Codes
ACK	Alles Clar Kuddel International » German
ACK	A Cursed Keyboard Miscellaneous » Funnies
ACK	A Continual Kvetch Miscellaneous » Funnies
ACK	ACKnowledgement Governmental » Military
ACK	Austock Group Ltd Business » ASX Symbols