XO
XO stands for:
- Chios , Greece, license plate reserved for future registrations
- Crystal Oscillator , see crystal oscillator
- Executive officer , executive officer in the military
- Extra Old (XO), age predicate designation for brandy and cognac, see VSOP
- LTE International Airways , Spanish airline (IATA code)
- Orbit , as ISO-3166-2 code
- XO laptop, see OLPC XO-1
- XO Communications , North American telecommunications company
- Xanthine oxidase , a metalloenzyme
See also:
