English abbreviations from xix to xlpe
- XIX (Nineteen (in Roman numerals))
- XIY (Xi'an Xianyang International Airport)
- XJ (Automobile made by Jaguar)
- XJ2 (XML Parser written in Java, version 2)
- XJC (Java Architecture for XML Binding Compiler)
- XJD-1 (Douglas Invader Experimental aircraft)
- XJL (Amphibian aircraft made by Columbia)
- XJL-1 (Columbia JL-1 Experimental aircraft)
- XJQ-1 (Fairchild JQ-1 Experimental Aircraft)
- XJQ-2 (Fairchild JQ-2 Experimental Aircraft)
- XJS (Automobile made by Jaguar)
- XJW (X-treme Junkyard Wrestling)
- XJW-1 (Waco JW-1 Experimental utility aircraft)
- XK (Automobile made by Jaguar)
- XK-6 (Xtreme Keyboard 6)
- XKA (IATA code for Kantchari Airport)
- XKB (X keyboard extension)
- XKE (Automobile made by Jaguar)
- XKH (IATA code for Xieng Khouang Airport)
- XKL (KL City Air Terminal)
- XKO (Kemano Airport)
- XKR (Automobile made by Jaguar)
- XKS (IATA code for Kasabonika Airport)
- XKW (Xtreme Kronik Wrestling)
- XKY (IATA code for Kaya Airport)
- XL (or EXL, Exploration Licence (United Kingdom), a type of onshore licence issued between the First Onshore Licensing Round (1986) and the Sixth (1992))
- XLB (Lac Brochet Airport)
- XLC (Xtreme Launch Coaster)
- XLD (Extra Light Duty)
- XLE (Xerox Linguistics Environment)
- XLF (Extensible Log Format)
- XLIFF (XML Localisation Interchange File Format)
- XLL (XML Linking Language)
- XLM (X Log Manager)
- Xln (Crystalline (minerals))
- XLO (Long Xuyen Airport)
- XLPE (Cross-linked Polyethylene)