Pronounced “wiz-ee-wig,” it refers to the type of user interface that allows the user to see the results of editing as its occurs. In contrast to more traditional editors that require developers to enter descriptive codes, or markup, but do not allow for an immediate way to view the results of the markup, a WYSIWG editor can display the results immediately. The first WYSIWYG editor to be created was a word processing program called Bravo, invented by Charles Simonyi at the Xerox Palo Alto Research Center in the 1970s. Bravo eventually evolved into two other very marketable WYSIWYG applications—Microsoft Word and Excel.
TechTarget. WYSIWYG. [Online, April 11, 2006.] TechTarget Website. http://whatis.techtarget.com/definition/0,,sid9_gci213392,00.html.