RMM may refer to: Mali, license plate code Rameswaram railway station (Indian Railways station code), in Tamil Nadu, India Riverside Metropolitan Museum, in Riverside, California, United States (previously Riverside Municipal Museum) Read-mostly memory, a type of memory Relative molecular mass, another name for molecular mass, the atomic weight of a molecule or compound RMM Records & Video, a former Latin music record label Remote monitoring and management, supervising and controlling software systems Royal Meath Militia, Irish Militia regiment in County Meath