(informal) McMaster University

(US military) Acronym of Military Airlift Command, formerly, one of three former divisions of the US airforce, the others being SAC and TAC. / Acronym of Military Armament Corporation.

(chemistry) Initialism of maximum allowable concentration, the maximum concentration of a pollutant which is considered harmless to healthy adults during their working hours, assuming they breathe uncontaminated air at all other times.

Abbreviation of Macedonian. (South Slavic language)

A patronymic used to form common Irish and Scottish names, similar to the English -son.

plural of Apple Mac

plural of Big Mac

plural of pac-a-mac

Alternative form of MacArthur

(computing, networking) Media Access Control address; a unique identifying number assigned to most network devices.