Xerox PARC was the birthplace of many aspects of modern computing, including many aspects of the Graphical user interface (GUI), the mouse, the WYSIWYG text editor, the laser printer, the desktop computer, Smalltalk the programming language, and Ethernet.
Considered by some as claiming responsibility for too many inventions, even for the things it did invent it often didn't bring them to the masses. For example, the modern GUI was developed at Xerox PARC, but commercialized first by Apple and then by Microsoft. This was due to Xerox management consistently failing to see the potential of these inventions, which has become the stuff of modern business legend. It was said that the top management of Xerox had their minds so fixed on the photocopier business, and inventions they could directly apply to it, that they lacked the vision to turn the great inventions coming out of PARC into products
External Link: Xerox PARC