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XPA : código IATA del aeropuerto Pama

XPA : XML Processing For ANTLR

XPA : SoniqSync Extended Playlist

XP : Xeroderma Pigmentoso

XP : Xtra Performance

XP : Transfer Protocol

XP : eXtreme Programming

XP : eXtreme Performance

XP : version 5.1 of Microsoft Windows

XP : eXperience Points

XOXO : eXtensible Open XHTML Outlines

XOT : X.25 Over TCP

XOT : Xnetech Job Output File

XOS : Xaos Tools image file Bitmap graphics

XOR : logical Exclusive OR (programming)