- AT-3
AT-3 may be:
*
AT-3 (jet trainer) of the Republic of China Air Force (Taiwan)
* AT-3 plane, Very Light Aircraft
*AT-3 Sagger , Soviet anti-tank missile
* AT-3 (MATH-MATIC ) compiler for UNIVAC mainframe computers
* .at3, extension for audio files compressed with Sony'sATRAC3 algorithm
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