From Wikipedia, the free encyclopedia
X11 may refer to:
- X Window System or X11, a system which implements the X display protocol
- Honda X11
- X11 (New York City bus)
- X11.app, the implementation of the X Window System in Mac OS X
- X11, a variation of the SL X10 train
- N11 code, any of a set of public service telephone numbers in North America
X-11 may refer to:
- Chevy Citation X-11, a performance-enhanced version of the Chevy Citation
- Convair X-11, the first testbed for what became the Atlas missile program
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