OMA or Oma may refer to: Businesses Office for Metropolitan Architecture, architecture firm founded by Dutch architect Rem Koolhaas Oswalds Mill Audio (OMA), a lifestyle company manufacturing horn loudspeakers and high end audio equipment Communication OMA (time signal), a former Czech longwave call sign .oma, extension for files encrypted by OpenMG Audio for Sony's ATRAC3 format Open Mobile Alliance, a standards body for the mobile phone industry Optical modulation amplitude, an optical communication term Outdoor Media Association, the peak industry body representing the Out-of-Home advertising industry in Australia Outlook Mobile Access, a mobile phone email program using Microsoft Exchange Server Engineering Operational Modal Analysis, a form of modal analysis which aims at identifying the modal properties of a structure based on vibration data collected when the structure is under its operating conditions Entertainment OMA Awards, awards created by MTV Oma Ichimura (born 1977), Japanese voice actor Oma Irama Penasaran, an Indonesian film released in 1976 Oma Marilyn Anona (born 1986), Nigerian multi-media personality One Man Army (band), a California punk rock band formed in 1996 Only Men Aloud!, young Welsh male voice choir Fictional characters Oma Desala, a character in the television series Stargate SG-1 , a character in Japanese light novel series Chivalry of a Failed Knight , a character in the video game Danganronpa V3: Killing Harmony , a character and protagonist in the Japanese anime television series Guilty Crown , a character and main protagonist from the Japanese manga series Kengan Ashura , alternately spelled Oma Zi-O, a character and the main antagonist of the 29th season of the Kamen Rider Series, Kamen Rider Zi-O Medicine Ontario Medical Association, a professional organization for physicians in Ontario, Canada Opsoclonus Myoclonus Ataxia, a neurological disorder also known as Opsoclonus myoclonus syndrome Otitis media acuta, an acute infection of the middle ear Places Ōma, a town in Aomori Prefecture, Japan Ōma Nuclear Power Plant, in Japan Oma, Russia, a village in Nenets Autonomous Okrug Oma, Wisconsin, a town in Iron County Transportation Eppley Airfield, northeast Omaha, Nebraska, by IATA airport code Grupo Aeroportuario Centro Norte, a Mexican airport operating company, by Mexican stock market ticker symbol Omaha (Amtrak station), station code ICAO designator for Oman Air, an Omani airline Other uses Cyclone Oma, impacted Vanuatu, New Caledonia and the Solomon Islands in 2019 Object Management Architecture, a vision for the component software environment Office of Multicultural Affairs, an Australian Government