English abbreviations from xavf to xcbf
- XAVF (XMAIL Anti- Virus Filter)
- XB (Experimental Bomber prototype)
- XB-38 (Experimental B-38 bomber, B-17 with P-38 Allison engines)
- XB-39 (Experimental B-39 bomber, B-29 with P-38 Allison engines)
- XB-42 (Experimental B-42 Mixmaster twin-engined bomber)
- XB-70A (Experimental B-70 Valkyrie Bomber prototype)
- XBA (European Composite Unit (EURCO; Bonds market unit) (ISO 4217 currency code))
- XBB (European Monetary Unit (E.M.U.; Bonds market unit) (ISO 4217 currency code))
- XBBL (Xperimental Blood Bowl League)
- XBC (X11- Basic Compiler)
- XBE (Bearskin Lake Airport)
- XBG (Bogande Airport)
- XBH (Extra Base Hits)
- XBI (Cross Boundary Integration)
- XBJ (Birjand Airport)
- XBK (Bourg - Ceyzériat Airport)
- XBL (Bedele Airport)
- XBM (Xbox Magazine)
- XBML (eXtended Business Modelling Language)
- XBN (Biniguni Airport)
- XBO (Boulsa Airport)
- XBQ (Radio-controlled assault drone)
- XBR (Brockville Regional Tackaberry Airport)
- xBrief (eXtensible Evidence Brief)
- XBRL (eXtensible Business Reporting Language)
- XBS (Xbox Solution)
- XBT (Expendable BathyThermograph)
- XBW (Xtreme Backyard Wrestling)
- XC (Ninety (in Roman numerals))
- XC# (eXtended C# language)
- XC., XCS. (Christus ("Christ" first, middle, and last letters of the Greek name))
- XC2 (Backflow Prevention Software)
- XCA (Cross Community Access)
- XCB (X protocol C language Binding)
- XCBF (XML Common Biometric Format)