MRO explained

MRO or Mro may refer to:

People

Hood Aerodrome (IATA code MRO), near Masterton, New Zealand
Marlborough (disambiguation), some cities named Marlborough use MRO as an abbreviation
Magdalena Ridge Observatory, a multi-use astronomical observatory near Socorro, New Mexico, United States
Morradoo railway station, Melbourne
Murchison Radio-astronomy Observatory in outback Western Australia, one of the Square Kilometre Array core sites

Hokuriku Broadcasting Company, also known as MRO, a broadcasting station in Ishikawa Prefecture, Japan
Marathon Oil Corporation, listed on the New York Stock Exchange as MRO
Melrose Industries, listed on the London Stock Exchange as MRO
MRO Software, a software company best known for its Maximo maintenance management system

Middlesex Record Office, former historical organisation, merged into the current-day London Metropolitan Archives in 1965
Midwest Reliability Organization, an electrical grid reliability organization
Oriental Revolutionary Movement (Movimiento Revolucionario Oriental), a Marxist–Leninist communist party in Uruguay
Mountains and Rivers Order, headquartered at the Zen Mountain Monastery in Mount Tremper, New York
Macedonian Revolutionary Organization, a revolutionary national liberation organization
Metsähovi Radio Observatory, an astronomical radio observatory in Kirkkonummi, Finland

Maintenance, repair and operations (or overhaul), fixing or maintaining any sort of mechanical, plumbing or electrical equipment
Main refinancing operations, a technique used by the European Central Bank to control the money supply
C3 linearization or Method Resolution Order, an algorithm used primarily to obtain the order in which methods should be inherited in the presence of multiple inheritance

Mro language (ISO 639 code: cmr), a Kukish language of Burma
Mru language (ISO 639 code: mro), a Sino-Tibetan language of Bangladesh
Mro (Unicode block), the Unicode block containing characters for writing the Bangladesh Mru language