XA

XA may refer to:

* a forum about "games" name Xtreme Addictions
* a processor architecture, called "extended addressing", first introduced by IBM in 1981 in the System/370 model 3081 mainframe computer
* Scion xA, a car
* the X/Open XA distributed transaction processing specification
* Chi Alpha, a college campus ministry group
* eXtended Architecture, a standard for CD-ROM drives
* Maxis proprietary audio format for The Sims and SimCity 3000
* the file extension ".xa". .XA files are audio files used in PlayStation and PSone
* Fantom-Xa synthesizer, made by Roland Corporation
* Olympus XA