X11
Proper noun
Meaning
X11
(computing) A windowing system for bitmap displays, common on Unix-like operating systems.
Examples
After Sun canceled NeWS, DUX Software contracted Hopkins to rewrite the HyperLook user interface in TCL/Tk for X11, and he developed a multi-player networked user interface using the X11 protocol.
Apple originally ported X to OS X in the form of X11.
Details YaST is also available without X11 (with ncurses YaST is free software that SUSE has made available under the GPL in 2004.
APE's authors claim to have used it to port the X Window System (X11) to Plan 9, although they do not ship X11 "because supporting it properly is too big a job".
Because OS X can optionally use an X11 server, porting GIMP to OS X is simpler compared to creating a Windows port.
Alpha testing of the software started in February 1987, beta-testing in May; the release of X11 finally occurred on 15 September 1987.