On November 10, 1983, at the Plaza Hotel in New York City, Microsoft Corporation formally announced Microsoft Windows, a next-generation operating system that would provide a graphical user interface (GUI) and multitasking environment for IBM computers. Microsoft promised that the new program would be on the shelf by April 1984. It might have been released under the original name of Interface Manager if Microsoft's marketing whiz, Rowland Hanson, had not convinced Microsoft founder Bill Gates that Windows was the better name.