In the telecommunications industry, MAC stands for Moves, Adds, and Changes. Basically, all this means that if you want to move 40 phones to a new floor, or add a voicemail, or a new digital line card, or a customer wants to change from POTS service to a T1 circuit, it would be considered MAC work.
Mac (?). [Gael., son.]
A prefix, in names of Scotch origin, signifying son.
© Webster 1913
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