ONT

ONT could mean:

• LA/Ontario International Airport (IATA code ONT), in Ontario, California, United States
• Optical Network Terminal, an interface between a telephone company's fiber optic network and premises wiring
• Ontario Northland Railway, a Canadian railroad
• Ordo Novi Templi, Order of the New Templars, an occult anti-semitic society founded 1907 by Lanz von Liebenfels
• Ontario Network Television, the main predecessor of the now-defunct Baton Broadcast System (Canada)
• Obshchenatsional'noe Televidenie, a Belarusian national television station
• ortho-nitrotoluene, a type of mononitrotoluene, a nitro compound derivate of toluene
• Organización Nacional de Transplantes (Spanish Transplant Organization), which manages human organ and tissue transplants in Spain

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