AA-1 or AA1 may refer to:
* , a United States Navy submarine also known as USS ''AA-1''
*
K-5 (missile), an early Soviet air-to-air missile, NATO reporting name AA-1 'Alkali'
*
Grumman American AA-1
The Grumman American AA-1 series is a family of light, two-seat aircraft. The family includes the original American Aviation AA-1 Yankee and AA-1A Trainer, the Grumman American AA-1B Trainer and TR-2, plus the Gulfstream American AA-1C ...
, a light aircraft
*
PRR AA1, a Pennsylvania Railroad electric locomotive
* ''
Phoenix Wright: Ace Attorney'', a video game
*
Acer Aspire One
Acer Aspire One is a line of netbooks first released in July 2008 by Acer Inc.
Many characteristics of a particular model of Acer Aspire One are dictated by the CPU platform chosen. Initial models were based on the Intel Atoms. Later, model ...
, a netbook computer
*
American Airlines Flight 1 (disambiguation) American Airlines Flight 1 may refer to:
* American Airlines Flight 1 (1936), an accident involving a Douglas DC-2
* American Airlines Flight 1 (1941), an accident involving a Douglas DC-3
* American Airlines Flight 1 (1962), an accident involving ...
, various flights
*
Aa1 is the second highest credit rating given by Moody's Investors Service
*
Bavarian AA I
The only AA I steam locomotive of the Royal Bavarian State Railways (''Königlich Bayerische Staatsbahn'') was built by the firm of Krauss in 1896. It had been designed by chief mechanical engineer, Richard von Helmholtz, as a 4-2-2-2 tender loc ...
, a steam locomotive
* ''1997 AA1'', the alternate name for
8735 Yoshiosakai, an outer main-belt asteroid
* Gardiner's
designated symbol for the hieroglyph that represents a sieve or placenta:
Aa1
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