Douglas Engelbart, the computing visionary who saw a future in the graphical user interface (GUI), and co-developed the modern mouse, passed away. He was 88. Engelbart conducted most of his work at the Stanford Research Institute (SRI), and his team's most noted work laid the foundation of the GUI and windowed multi-tasking as we know today. Among his inventions are windowed GUI, the mouse as we know it, hypertext (text on the screen that you click to perform a function), and networked computers. "The Mother of All Demos," nickname for a tech-demo presented by Engelbart, which dates back to 1968, reveals just how much we owe today's computing innovations to the groundbreaking work done by him and his team.