Acknowledgment (electronic tax filing), an official electronic notice from the IRS or a state tax authority indicating whether or not the e-file was accepted and considered “filed” or rejected and considered “not filed.”
Acknowledgment (social), a written thank you note expressing gratitude for gifts, assistance, or expressions of sympathy
Telecommunication
Acknowledgment code (ACK), a signal used to indicate acknowledgment, specifically:
ACK (TCP), a packet used in TCP to acknowledge receipt of a packet
Acknowledgement - ethical, as in to "offer someone acknowledgement" or to "provide recognition". To take someone seriously as an end in themselves, as a human worthy of respect, as having a valid point of view, as a genuine ethical subject.
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