A researcher and executive over the years at Xerox, Apple, Yahoo, and Amazon, Tesler had enormous influence over the experience most people have when using a personal computer today: in addition to cut-copy-and-paste, he developed such basics as WYSIWYG (What You See Is What You Get, meaning what you print out should look like what was on your screen), double-clicking, and how hard you need to press a mouse button. Indeed, he was a pioneer in simply asking regular users, as opposed to programmers, how they wanted their computers to work. – The Washington Post