XA
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XA may refer to:
- a processor architecture, called extended addressing, first introduced by IBM in 1981 in the System/370 model 3081 mainframe computer
- Scion xA, a car
- A buddy
- 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