Not to be confused with X0 (disambiguation) (X followed by zero). Xo or XO may refer to: XO, a grade of cognac, meaning "extra old", XO, the IATA code for Spain's LTE International Airways, XO Communications, a telecom company, XO Group, a media company, XO sauce, a spicy seafood sauce, XO Telescope and its related exo-planet survey, OLPC XO-1 laptop, produced by the One Laptop per Child association, OLPC XO-3 laptop, next generation One Laptop per Child laptop, Crystal oscillator, an electronic circuit that uses the mechanical resonance of a vibrating crystal to create an electrical signal with a precise frequency XO, the now-deprecated abbreviation for crystal oscillators on electrical schematic diagrams, , Executive officer in the military, Executive order (disambiguation), an edict by a member of the executive branch of a government, Eastern Orthodox Christianity (from the Greek: Χριστιανός Ορθόδοξος, Xristianos Orthodoksos), Turner syndrome, a genetic condition in which one of the sex chromosomes is absent, Hugs and kisses, sometimes written as a sequence of XOs, Xanthine oxidase, an enzyme that catalyzes the oxidation of hypoxanthine to xanthine, Xbox One, a video game console by Microsoft, Music: XO (Elliott Smith album), 1998, XO (Leathermouth album), 2009, "XO" (song), by Beyoncé (2013), "XO", a song by Fall Out Boy from the album From Under the Cork Tree, XO, a record label used by artist The Weeknd

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