Revolutionary Committees Movement, a political and cultural movement in Libya

Royal Canadian Mint

Reliability centered maintenance, an industrial improvement approach

Radar Coded Message, a form of Nexrad radar output

Regional county municipality, a territorial subdivision of Quebec

Royal College of Music, in London, England

Regimental Corporal Major, a warrant officer appointment in the British Household Cavalry

Royal Conservatory of Music (Toronto)

Reciprocating Chemical Muscle, a mechanism that takes advantage of the superior energy density of chemical reactions

Ring-closing metathesis, a variation on olefin metathesis

Reverse Cuthill-McKee algorithm, an algorithm to reduce the bandwidth of sparse symmetric matrices

Rapid Communications in Mass Spectrometry, a scientific journal

Rassemblement des citoyens et des citoyennes de Montréal (Montreal Citizens' Movement), a municipal political party in Montreal, Quebec, Canada, that existed from 1973 to 2001

Red Carpet Massacre, a Duran Duran album