- HJ
HJ or Hj can mean:
*
Asian Express Airlines IATA airline designator
*Handjob , a sexual act
* hectojoule (hJ), an SI unit of energy equal to 102 joules
*Hall–Janko group , a mathematical group
*Hero's Journey (MMORPG) , the game by Simutronics Corp.
*Heterojunction , the interface between two layers of dissimilar crystalline semiconductors
*Hilal-i-Jurat , the second highest military award of Pakistan
*Hitler-Jugend , the German name for the Hitler Youth
*Hotel juliet , U.S. code word for a cryptographic key change
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