Charles Simonyi developed Bravo, the first WYSIWYG word processor, for the Alto at Xerox PARC. He later wrote Microsoft Word, and other parts of what became MS

Charles Simonyi developed Bravo, the first WYSIWYG word processor, for the Alto at Xerox PARC. He later wrote Microsoft Word, and other parts of what became MS Office, at Microsoft, where he was Chief Architect: https://en.wikipedia.org/wiki/Charles_Simonyi https://en.wikipedia.org/wiki/Charles_Simonyi He designed what is now called Hungarian Notation: https://en.wikipedia.org/wiki/Hungarian_notation https://en.wikipedia.org/wiki/Hungarian_notation Word uses the famous piece table data structure -- also from PARC -- which is how "fast saves" work. https://web.archive.org/web/20160308183811/http://1017.songtrellisopml.com/whatsbeenwroughtusingpiecetables https://web.archive.org/web/20160308183811/http://1017.songt... As a result Simonyi is a billionaire and was the first ever two-time space tourist: https://www.theguardian.com/world/2009/mar/26/space-tourist-simonyi https://www.theguardian.com/world/2009/mar/26/space-tourist-... You could justifiably say that he and his work are quite famous. (!)