What does NACK stand for?

NACK stands for "Negative ACKnowledge"

How to abbreviate "Negative ACKnowledge"?

"Negative ACKnowledge" can be abbreviated as NACK

What is the meaning of NACK abbreviation?

The meaning of NACK abbreviation is "Negative ACKnowledge"

What does NACK mean?

NACK as abbreviation means "Negative ACKnowledge"