What does AA stand for?

MLA style: "AA." Acronym Finder . 2012. AcronymFinder.com 27 May. 2012 <a href="http://www.acronymfinder.com/Approximate-Absolute-(temperature-scale)-(AA).html">http://www.acronymfinder.com/Approximate-Absolute-(temperature-scale)-(AA).html
Chicago style: Acronym Finder . S.v. "AA." Retrieved May 27 2012 from <a href="http://www.acronymfinder.com/Approximate-Absolute-(temperature-scale)-(AA).html">http://www.acronymfinder.com/Approximate-Absolute-(temperature-scale)-(AA).html
APA style: AA. (n.d.) Acronym Finder. (2012). Retrieved May 27 2012 from <a href="http://www.acronymfinder.com/Approximate-Absolute-(temperature-scale)-(AA).html">http://www.acronymfinder.com/Approximate-Absolute-(temperature-scale)-(AA).html

Approximate Absolute (temperature scale)

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Application Activity Application Administrator Application Association Applied Aerodynamics (course) Appointing Authority Appropriate Action Appropriate Authority Approval Action Approved Apparatus Approving Authority		Aptitude Area Arachidonic Acid Arboricultural Association (Hampshire, England) Archery Australia Architectural Association (London, England) Architecture d'Aujourd'hui (French: Architecture Today; magazine) Area of Action Argentum Astrum (Aleister Crowley's Mystical Fraternity) Arithmetic Accuracy Arithmetic Average