Concepts and ideas of Word were brought from Bravo, the original GUI word processor developed at Xerox PARC. Bravo's creator Charles Simonyi left PARC to work for Microsoft in 1981. Simonyi hired Richard Brodie, who had worked with him on Bravo, away from PARC that summer. On February 1, 1983, development on what was originally named Multi-Tool Word began.