ATO may stand for: · Abort to Orbit, one of the Space Shuttle abort modes · Air Training Officer, a former position at the United States Air Force Academy · Air Traffic Organization, a FAA terminology · Alpha Tau Omega, an American student fraternity · Alternative Trading Organization (ATO) - a non-governmental organization focusing on Fair Trade exports from developing countries to developed countries. · Ammunition Technical Officer, a designation in the British Armed Forces · Atmos Energy Corporation's ticker symbol on the New York Stock Exchange · Australian Taxation Office, the Australian government agency which collects taxes and enforces taxation legislation · Authority To Operate · Automatic Throw Over (Switch) - equipment which allows for the transfer of electric power from a normal line to an alternate line if the normal line has an outage. · Automatic tra

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