XP
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XP may stand for:
- An Emoticon of a punk sticking their tongue out at you.
- Cross-platform ("X" looks like a cross and is often used to replace this word or its synonyms in abbreviations).
- eXtreme Programming.
- Experience points in a role-playing game or in Everything2.
- AMD Athlon XP CPU.
- As the Chi Rho, the symbol that the emperor Constantine I saw in the sky before the Battle of the Milvian Bridge in 312. First two letters in Christ in Greek, therefore symbolic of Christianity. See Labarum.
- Windows XP operating system. The official Microsoft explanation for this name is a derivation from "experience"; another notes that "Cairo" was Microsoft's codename for an object-oriented operating system that would eliminate completely MS-DOS code from Microsoft Windows; Windows XP (chi-rho) completes the process.
- A two-character emoticon representative of a sick or dying person, or of extreme laughter of a topic where it becomes so humorous that you would make yourself sick