English abbreviations from x to xav
- X (plane - Experimental aircraft)
- X/12 (X months)
- X/52 (X weeks)
- X/7 (X days)
- X., XPC., XS. (Christus ("Christ"))
- X11 (X Windows System, Version 11)
- X11R6 (X Windows System, Version 11 Release 6)
- X3D (Extensible Three-Dimensional)
- XA (CD-ROM extended architecture)
- XAAS (X (anything) As A Service)
- XAB (Abbeville - Buigny-Saint-Maclou Aerodrome)
- XAC (Arcachon – La Teste-de-Buch Airport)
- XACT (X Audio Compression Toolkit)
- XAE (XML Authoring Environment)
- XAF (BEAC (Banque des états de l'Afrique centrale) Central Africa CFA (Coopération financière en Afrique centrale) franc (ISO 4217 currency code))
- XAG (Silver Troy ounce (ISO 4217 currency code))
- XAJ-1 (Prototype AJ-1 Savage carrier-based strategic bomber)
- XAK (X-Treme Ass Kickers)
- XAL (Álamos Airport)
- XAML (eXtensible Application Markup Language)
- XAMPP (X ("cross"-platform), Apache HTTP Server, mySQL, PHP and Perl)
- XAN (Xanthine)
- XANES (X-ray Absorption Near-Edge Structure)
- XAO (XML Application Objects)
- XAP (Chapecó Airport)
- XAPS (XML Admin Permission Sheet)
- XAR (Aribinda Airport)
- XAS (X-ray Absorption Spectroscopy)
- XAU (Gold Troy ounce (ISO 4217 currency code))
- XAV (XMAIL Anti- Virus)
