An emoticon commonly used on the internet to express happiness, self-depreciation, laughter, bewilderment, or sarcasm. (Tilted 90 degrees clockwise, X indicates squeezed eyes and D an open laughing mouth.)
NX bit (sometimes called the XD bit), a security-related computer technology for x86 and x64 processors
xD-Picture Card, a format of flash memory developed by Olympus and Fuji, and used mainly in their digital camera products
Extreme Definition, an informal term used to describe High-definition television (1440p) and distinguish it from Extreme High Definition (XHD).
Disney XD, short for eXtreme Digitial, a feature of the Disney.com interactive website
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