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For other uses, see Oxo (disambiguation).
OXO emulated screenshot.png
OXO played in an EDSAC emulator for System 6/System 7 running in Classic in Mac OS X v10.4.3.
Developer(s) A.S. Douglas
Designer(s) A.S. Douglas
Platform(s) EDSAC
Release date(s) 1952
Genre(s) Paper and pencil game
Mode(s) Single player

OXO was a computer game developed by Alexander S. Douglas in 1952 for the EDSAC computer, which simulates a game of Noughts and crosses, also sometimes called Tic-tac-toe. Douglas programmed the game as part of his Ph.D. thesis on human-computer interaction for the University of Cambridge. OXO is the earliest known game to display visuals on a video monitor.[1]

To play OXO, the player would enter input using a rotary telephone controller, and output was displayed on the computer's 35×16 dot matrix cathode ray tube. Each game was played against an artificially intelligent opponent.

See also[edit]


  1. ^ "A.S.Douglas' 1952 Noughts and Crosses game". Pong-Story. Retrieved 2013-05-21. 

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