Romania, "ROM" being the former International Olympic Committee abbreviation for the country

Republic of Macedonia

Rom (plural Roma), one of the Romani people, an ethnic group commonly known in the English-speaking world as Gypsies

Rome, Italy, called "Rom" in German, Danish and Swedish

Royal Ontario Museum, a museum located in Toronto, Ontario, Canada

Read-only memory, a class of storage media used in computers and other electronic devices. This tells the computer how to load the operating system.

"rom", the ISO 639 alpha-2 designation of the Romani language

ROM image, a computer file which contains a copy of the data from a read-only memory chip

Rom the Spaceknight, a fictional character from the Marvel Comics universe

Random oracle, as in "random oracle model", a mathematical abstraction used in cryptographic proofs

Rom, Germany, a municipality in Mecklenburg-Vorpommern, Germany

Range of motion, a medical term for the measure of movement through a particular joint or muscle range

ROM (MUD), a popular MUD codebase

ROM Eiendom, a real estate company owned by the Norwegian State Railways

ROM cartridges, a portable form of read-only memory

Rom, Deux-Sèvres, France, a commune in the Deux-Sèvres département

The Registry of Marriages in Singapore

Rom River, in Val Müstair, Switzerland

Range of Motion (exercise machine), an exercise machine that claims to give a full workout in 4 minutes

Mac computers typically included Old World ROM or New World ROM

Rom (Star Trek), a fictional Star Trek character who appears in Star Trek: Deep Space 9

Reign Over Me, a movie starring Don Cheadle and Adam Sandler

Run of Mine, the rock received from a mine before processing such as crushing or grinding

Rupture of membranes, a medical term referring to a process of childbirth