I don't think AA is an abbreviation in the case of batteries... but what is it? Also I don't think it's an English use but a universal one. Hippietrail 04:05, 4 Feb 2004 (UTC)
- I think this subject has come up before, but I can't find where. I'd be inclined to classify this as a "symbol", perhaps under "translingual" like the chemical symbols. -- Ortonmc 04:20, 4 Feb 2004 (UTC)
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- It's an abbreviation used by the United States Postal Service; just as "MI" is Michigan and "OH" is Ohio, "AA" denotes "Armed Forces Americas", i.e. American armed forces in the Americas, minus the U.S., minus Canada. See United States Postal Service - Abbreviations. It may be possible to "cite" this in some fashion, but I think we should simply keep it without worrying about cites. It's the only official abbreviation for that, so it surely appears on the vast majority of letters sent to applicable destinations. —RuakhTALK 02:56, 18 November 2010 (UTC)