XP may refer to:
Science and technology
Computing
- 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
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, formerly 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 <code>XP</code>), a fictitious country used in military operations
- XP, an emoticon
- X phrase, in X-bar theory in linguistics
- Xp Lee, a Thailand-born American politician
See also
- Chi Rho (☧, or chi-rho), a Christian symbol for Christ
- 10P (disambiguation)
- PX (disambiguation)
- XPS (disambiguation)