AK

AK may mean:

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• Alaska (U.S. postal abbreviation)
• Applied kinesiology
• the US Navy hull classification symbol for Cargo Ship
• Armia Krajowa (Home Army), underground resistance in Nazi-occupied Poland during World War 2
• AK-47 (Avtomat Kalashnikova model 1947 g.), Russian rifle
• the IATA code for Air Asia based in Malaysia
• Ace-King (in Poker)
• Patient AK, notable for electric stimulation to the brain eliciting laughter
• A.K. (1985), a film directed by Chris Marker about the making of Kurosawa's Ran (1985)
• AK Press.

aK may mean:

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• attokelvin, an SI unit of temperature

ak may mean:

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• Akan language (ISO 639 alpha-2)