English abbreviations from xnn to xphloc
- XNN (IATA code for Xining Caojiabao Airport)
- XNQ-1 (Fairchild Experimental Trainer Aircraft)
- XNR (X News Reader)
- XNS (Xerox Network Systems)
- XNT (Xingtai Airport)
- XNU (X is Not Unix)
- XO (Executive Officer)
- XOD (Xanthine Oxidase)
- XOE (eXtensible Operating Environment)
- XOF (BCÉAO (Banque centrale des états de l'Afrique de l'Ouest) West African CFA (Communauté financière d'Afrique) franc (ISO 4217 currency code))
- XOG (Orange-Caritat Air Base)
- XOK (eXOKernel)
- XOL (XML-based Ontology Exchange Language)
- XOM (Exxon Mobil)
- XOP (XML-binary Optimized Packaging)
- XOR (logical Exclusive OR (programming, IC design))
- XOV (Cross-Over Valve)
- XOXO (eXtensible Open XHTML Outlines)
- XP (eXperience Point (role-playing games))
- XPA (Pama Airport)
- XPath (Extensible Markup Language Path Language)
- XPCOM (Cross Platform Component Object Model)
- XPD (Palladium Troy ounce (ISO 4217 currency code))
- XPDR (Transponder)
- XPERM (Matrix Permeability in the X-Direction)
- XPF (CFP franc (ISO 4217 currency code))
- XPHLOC (Crossplot Selection for XPHI)