MMR may refer to:
Science and technology
- MMR vaccine, for measles, mumps and rubella
- DNA mismatch repair, a genetic repair pathway
- Mass miniature radiography, a tuberculosis screening technique
- Maternal mortality ratio, the ratio of the number of maternal deaths during a given time period per 100,000 live births during the same time-period
- Maternal mortality rate, the number of maternal deaths in a population divided by the number of women of reproductive age
- Mean-motion resonance, an interaction between two orbiting bodies
- Mesozoic Marine Revolution, the burst of evolution in the Mesozoic era caused by increased predation pressure
- Monitoring and Reporting Regulation
Computing
- Meet-me room, a place where networks providers offer interconnectivity to their backbones
- Modified Modified READ, an image compression algorithm
- Multi-master replication, a method of database replication
- "Matchmaking rating", a value score given for matchmaking based on a rating system
Arts and entertainment
- Metal Mind Records, a Polish record label
- MetroMedia Radio, a former American radio network
Places
- Myanmar (ISO 3166-1 alpha-3 country code)
- Mumbai Metropolitan Region, India
Other uses
- Merchant Marine Reserve, members of the US Merchant Marine who are also members of the US Navy
- Marine Mammal Regulations, of Canada
- Master of Marketing Research, a business degree