RUM

RUM may refer to:


 * the Remington Ultra Magnum family of cartridges
 * the United States Department of Defense aerospace vehicle designation for a ship-launched, anti-submarine guided missile
 * Real user monitoring, a term used in measuring internet web application performance
 * University of Puerto Rico at Mayagüez
 * Rigid unit modes, phonon modes in which polyhedra are free to move by translation and/or rotation without distortion
 * Republic of the Union of Myanmar, official name of Myanmar