John M. Ousterhout (computer scientist)

John M. Ousterhout is a computer scientist known for developing Tcl, a scripting language that simplifies programming tasks, and for his work on operating systems, notably the creation of the Sprite OS, which advanced research in computer system design. He also played a key role in developing the widely-used windowing system for UNIX, called X11. Ousterhout's contributions have significantly influenced how computers are programmed and how software interfaces are designed, helping make technology more flexible and accessible for developers and users alike.