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, eg. of joints in physiotherapy

Computers and mathematics

* 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 * Random oracle model, a mathematical abstraction used in cryptographic proofs * ROM (MUD), a popular MUD codebase * Request of Maintainer (see Software maintainer)

Engineering

* Range of motion, the distance that a movable object may normally travel while properly attached to another object * RFID on metal, refers to 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

* Republic of Macedonia, former name of the Republic of North Macedonia * 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

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.'' {{disambiguation|geo