CM, cM, Cm or cm may stand for:

CM

• Apollo Command/Service Module (command module is one half)
• Canadian Maritime
• Cameroon, ISO and FIPS country code
• category management
• Catholic Memorial
• center of mass
• Center Middfielder
• Championship Manager, a series of association football computer games
• Chelmsford British post code region "CM"
• Chessmaster
• Chief Minister of a state
• circular mil (CM or circ. mil), American wire gauge (an unit for the cross-sectional area of electrical wires)
• The Class Menagerie, a webcomic
• client manager
• Club Monaco, an upscale clothing retailer
• Comic Market
• commercial model
• common metre
• compact muon, an energy range studied in particle physics
• Computer Modern, the standard font that ships with the TeX computer typesetting system
• configuration management
• Congregatio Missionis, the Congregation of Priests of the Mission in the Roman Catholic Church
• content management
• contract manufacturer
• Copa Airlines (IATA airline designator)
• country music
• CrystalMUSH, a computer game.
• cultural management
• Member of the Order of Canada (post-nominal letters)

cM

• centimorgan

cm

• centimetre, unit of length
• .cm, the country code top-level domain for Cameroon

Cm

• C minor, in music
• curium, the chemical element

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