Xo or XO may refer to:
XOR gate (sometimes EOR, or EXOR and pronounced as Exclusive OR) is a digital logic gate that gives a true (1 or HIGH) output when the number of true inputs is odd.
Xorn is the alias of two fictional characters appearing in American comic books published by Marvel Comics.
XOXO is the first studio album by South Korean-Chinese boy band Exo, released on June 3, 2013 by SM Entertainment and distributed by KT Music.
"XO Tour Llif3" (stylized as "XO TOUR Llif3" and pronounced "XO Tour Life") is a single by American rapper Lil Uzi Vert from his extended play Luv Is Rage 1.5 (2017) and debut album Luv Is Rage 2 (2017).
XO is the fourth studio album by American singer-songwriter Elliott Smith. It was recorded from 1997 to 1998 and released on August 25, 1998 by record label DreamWorks; Smith's first solo album on a major record label.
The Xojo programming environment and programming language is developed and commercially marketed by Xojo, Inc.
XO (also known as XO Records) is a Canadian record label founded by singer The Weeknd and his manager Amir "Cash" Esmailian.