X11 is a windowing system common on Unix-like operating systems.
X11 or X-11 may also refer to:
Technology X11 (hashing algorithm) N11 code, any of a set of public service telephone numbers in North America X11.app, the implementation of the X Window System in Mac OS X X-11-ARIMA, a predecessor of the X-13ARIMA-SEATS statistics software package
Transportation X11 (New York City bus) Convair X-11, the first testbed for what became the Atlas missile program Honda X11, a motorcycle Chevrolet Citation X-11, a performance-enhanced version of the Chevrolet Citation car X11, a variation of the SL X10 train
Other uses Settlement X11, of the Kuhikugu archaeological site in Brazil X11 License, a variation of the MIT permissive software license
See also