CM or its variants may refer to:
Phillip Jack Brooks (born October 26, 1978), better known by the ring name CM Punk, is an American mixed martial artist, comic book writer, and retired professional wrestler.
Complementary metal–oxide–semiconductor (CMOS), also known as complementary-symmetry metal–oxide–semiconductor (COS-MOS), is a type of MOSFET (metal–oxide–semiconductor field-effect transistor) fabrication process that uses complementary and symmetrical pairs of p-type and n-type MOSFETs for logic functions.
The Mexican professional wrestling promotion Consejo Mundial de Lucha Libre (CMLL) has traditionally held an annual Reyes del Aire (Spanish for "Kings of the Air") tournament since 2005. There was no tournament in 2010 and both 2007 and 2012 saw two Reyes del Aire tournaments.
The CMYK color model (; process color, four color) is a subtractive color model, based on the CMY color model, used in color printing, and is also used to describe the printing process itself.
CM chondrites are a group of chondritic meteorites which resemble their type specimen, the Mighei meteorite.
CMA-ES stands for covariance matrix adaptation evolution strategy. Evolution strategies (ES) are stochastic, derivative-free methods for numerical optimization of non-linear or non-convex continuous optimization problems.
In August 2012 the Mexican professional wrestling promotion Consejo Mundial de Lucha Libre (CMLL) held five CMLL Super Viernes shows, all of which took place in Arena México on Friday nights.