XP may refer to:

Science and technology

Computing

Windows XP Windows XP is a major release of Microsoft's Windows NT operating system. It was released to manufacturing on August 24, 2001, and later to retail on October 25, 2001. It is a direct successor to Windows 2000 for high-end and business users a ...

, 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

Medicine

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

Other technology

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

Transport

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

Other uses

* 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 An emoticon (, , rarely , ), short for emotion icon, is a pictorial representation of a facial expression using Character (symbol), characters—usually punctuation marks, numbers and Alphabet, letters—to express a person's feelings, mood ...