Rom, or ROM may refer to: Biomechanics and medicine Risk of mortality, a medical classification to estimate the likelihood of death for a patient Rupture of membranes, a term used during pregnancy to describe a rupture of the amniotic sac Range of motion, e.g. of joints in physiotherapy Computers and mathematics Android ROM, a file containing executable instructions of an Android OS Read-only memory, a type of storage media that is used in computers and other electronic devices ROM cartridge, a portable form of read-only memory ROM image, a computer file which contains a copy of the data from a read-only memory chip ROM (MUD), a popular MUD codebase Engineering Range of motion, the distance that a movable object may normally travel while properly attached to another object RFID on metal, radio-frequency identification (RFID) tags which perform a specific function when attached to metal objects Rough order of magnitude, a type of cost estimation Fiction and entertainment Ethan Rom, one of the Others in the TV series Lost Rom (comics), a Marvel Comics superhero based on the Parker Brothers toy of the same name Rom (Star Trek), a Ferengi character in Star Trek: Deep Space Nine Rom, a fictional character in Hyperdimension Neptunia Mk2 Runes of Magic, a popular MMORPG Rom, a boss in the videogame Bloodborne Read-Only Memory (publisher), a British publisher of art books related to the Britsoft era of video game development Rom (album) Places and structures River Rom, England Rom (river), Switzerland and Italy Rom, Afghanistan, a village in Sar-e Pol province, Afghanistan Rom, Deux-Sèvres, a commune in the Deux-Sèvres department in western France Rom (Mecklenburg), a community in the district of Parchim, Mecklenburg-Vorpommern, Germany Rom, a district of Morsbach in North Rhine-Westphalia, Germany Rom, Iran, a village in South Khorasan Province, Iran Royal Ontario Museum, a museum in Toronto, Ontario, Canada The Rom, skatepark in Hornchurch, East London, England Romania, UNDP code and former IOC code Society Rom (plural Roma), one of the ethnic designations used by the Romani people rom, Romani language, language code ISO 639 alpha-2 Rom or ROM, system of Indigenous Australian customary law ROM ceremony, a Yolngu ceremonial practice Other uses Return on margin, a judge of performance based on the net gain or net loss compared to the perceived risk Refuel On the Move, a DoD logistic action Epistle to the Romans, a book of the Bible commonly abbreviated Rom.