English abbreviations from xex to xg
- XEX (Xtreme Elite Xecutioners)
- XF (XML Framework)
- XF-85 (GOBLIN Experimental parasitic fighter for B-36)
- XF-92 (Convair Model 7-002 Experimental supersonic fighter)
- XFA (XML Forms Architecture)
- XFA-T (XML Forms Architecture Template)
- XFB (eXtended File Broker)
- XFC (Xtreme Fighting Championships)
- XFD (Fighter aircraft made by Douglas)
- Xfe (X File Explorer)
- XFF (X-Forwarded-For)
- XFG (Exfoliation glaucoma)
- XFH (1932 rototype U.S. Navy fighter aircraft made by Hall)
- XFH-1 (McDonnell Phantom Experimental fighter)
- XFJ-1 (Berliner-Joyce Experimental fighter)
- XFJ-2 (North American Fury Experimental fighter)
- XFL (eXtreme Football League)
- XFM (Xandros File Manager)
- XFN (Xiangfan Airport)
- XFO (XMCP Feature Object)
- XFO-1 (Lockheed Experimental fighter)
- XFP (eXtensible Filtering Pipeline)
- XFR (Transfer)
- XFS (Executed by Firing Squad)
- XFT (X FreeType interface library)
- XFU (X- Files University)
- XFV (Exoskeleton Flying Vehicle)
- XFV-1 (Lockheed Salmon Exoskeleton Flying Vehicle)
- XFW (IATA code for Hamburg Finkenwerder Airport)
- XFY-1 (Convair Pogo Experimental vertical takeoff aircraft)
- XG (Automobile made by Hyundai)