Rio (windowing system)

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rio

rio interface as windowing system
Developer(s)	Rob Pike
Initial release	Fourth Edition / April 28, 2002; 22 years ago (2002-04-28)
Written in	C
Operating system	Plan 9 from Bell Labs
Type	Windowing system
Website	p9f.org

rio is Plan 9 from Bell Labs' windowing system. It is well known for making its window management transparent to the application. This allows running rio inside of another window manager.