CM, Cm, cM or cm may stand for:CM
Apollo Command/Service Module (command module is one half)
Cameroon, which has the ISO and FIPS country code "CM"
Candidate Master, an international chess title
Center of mass, the point at which an object's mass seems to be concentrated
Chelmsford, which has the British post code "CM"
Chief minister, the elected head of government of a sub-national state
Circular mil, a unit of area equal to the area of a circle with a diameter of one mil
Commercial, it is used in the Japanese language as an acronym for a TV commercial
Common metre, an iambic metre consisting of four lines of length 8, 6, 8 and 6 syllables
Connection Machine, a series of supercomputers.
Copa Airlines, which has the IATA airline designator "CM"
Lazarists, also known as Congregatio Missionis, the Congregation of Priests of the Mission in the Roman Catholic Church
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c.m. (corrente mese)