XD
XD or xD stands for:
- in net jargon a symbol for a smiling face, see emoticon
- xD-Picture Card , a storage medium
- "EXecute Disable": a technology for "improving the security of a computer" from Intel, see NX bit
- the planning name of the InterRegio
- a series of SLR cameras from Minolta, see Minolta XD7
- a ship type from the Warnow shipyard, see type XD (ship type)
- a US small car, see Scion xD
- Roman numerals for 490
XD as a distinguishing mark on license plates: