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The Roman numeral representing the number nine — literally one(I) less than ten (X).

(There are also separate Unicode characters for this number, 0x2168 "Ⅸ" and 0x2178 "ⅸ").

Internet Exchange, or Internet Exchange Point.

iX: A German monthly computer magazine.

The IX multilevel-secure Unix operating system

Unclassified Miscellaneous Units: US Navy hull classification symbol.

The Maya jaguar god supporting the west portion of the sky. See Maya mythology.

Also the 14th day name (or Tsolk'in) in the Maya tradition (often with a glottal stop in front of it " 'Ix ")

The central governmental supercomputer in the videogame Omikron - The Nomad Soul.

A fictional planet in Frank Herbert's novel Dune. See Ix (Dune).

A fictional country in the book Queen Zixi of Ix by L. Frank Baum, neighboring on the Land of Oz.

A nickname for Ford Prefect — a character from The Hitchhiker's Guide to the Galaxy — that translates into "boy who is not able satisfactorily to explain what a Hrung is, nor why it should choose to collapse on Betelgeuse Seven".

ix, a series of automatic teller machines manufactured by Diebold

iX is the name of Megaman X's sadistic alter-ego, who originated from the Limited Virus created by Dr. Doppler in the Rockman Mega Mission manga adaptation.

IX is the name of a series of websites from Swiss based travel operator Ixeo