Hi
The inventor of GUI, Mouse etc is a team of scientist at Xerox PARC lab:
http://applemuseum.bott.org/sections/gui.htmlTaking the visions of Engelbart, and their new visionaries like Larry Tesler and Alan Kay, these began work on a new type of computer. They decided that its operating system would do away with the arcane command-line interface and instead would emulate the simplicity of a user's desktop, where papers overlapped each other and were moved at will while actions were performed on them without complex commands to type. In only three years, there machine was created.
