XP

• Windows XP, a Microsoft operating system
• Microsoft Office XP, a version of the software suite
• Athlon XP, a series of AMD microprocessors
• Extreme programming, a software development methodology
• XP (class), a complexity class in parameterized complexity

• Xanthelasma palpebrarum, a cholesterol deposit in the eyelid
• Xeroderma pigmentosum, a genetic disorder

• Ilford XP, a chromogenic black and white film made by Ilford Photo

• XP, United States aircraft designator, formely for Experimental Pursuit, currently for Experimental Patrol
• Avelo Airlines (IATA code: XP), an American ultra low-cost airline

• XP Inc., a Brazilian investment management company
• Experience point, a unit for measuring a character's progress in role-playing games
• Purpleland (NATO country code XP), a fictitious country used in military operations

• XP, an emoticon
• X phrase, in X-bar theory in linguistics

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• The Greek abbreviation ΧΡ (☧, or chi-rho), a Christian symbol for Christ
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• 10P (disambiguation)
• PX (disambiguation)
• XPS (disambiguation)

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