What does ATU stand for?

Actuant Corp. - NYSE symbol

Adaptive Tracker Unit (ACAE)

Address Translation Unit (NITA)

Advanced Training Unit

Aegis Training Unit (SAUS)

Aerial Tuning Unit - Telecommunications (OA)

African Telecommunication Union (SAUO)

AIDS Treatment Update (SAUO)

Aircraft Target Unit (SAUS)

Airlock Audio Terminal (SAUS)

Airship Training Unit (SAUO)

Air Toulon - France - ICAO designator (FAAC)

Air Trial Unit (SAUS)

Alcoholism Treatment Unit (MELL)

Alcohol Tax Unit - Department of the Treasury

Alliance of Independent Telephone Unions - Later, TIU

Alliance of Telephone Unions (SAUS)

Amalgamated Transit Union (EA)

Amalgamated Transit Unions (SAUO)

American Technological University (MCD)

Amphibious Task Unit - Military (DNAB)

Analysis and Transformation Unit (SAUS)

Anchorage Telephone Utility (SAUO)

Anglo-Turkish Union (SAUO)

Antenna Tuning Unit (MSA)

Anti-Terrorist Union (SAUO)

Application Terminal Unit - Telecommunications (TEL)

Arab Telecommunications Union (EA)

Army Transportation Unit (SAUO)

Arthurian Resources Ltd. - Vancouver Stock Exchange symbol

Athens University - Greece - Seismograph station code, US Geological Survey (SEIS)

Atomic Time Unit

Attitude - Telegraphy (PCTE)

Attu, AK - Location identifier - FAA (FAAL)

Audio Terminal Unit (NASA)

Audio Thermal Unit (MCD)

Augsburg Transmission Upgrade (MCD)

Automated Translation Unit - Military technology (DDF)

Automatic Tracking Unit

Autonome Transfer Unit - Computer science (DIT)

Autonomous Transfer Unit (SAUS)

Auxiliary Test Unit

Reel - Language code (ETLW)

Texas Sailcraft Inc., Houston, TX - Manufacturer code for watercraft hull identification number (USCG)