1) Tablet computer 2) Xerox computer 
(from the article `computer`) Two computer scientists at PARC, Alan Kay and Adele Goldberg, published a paper in the early 1970s describing a vision of a powerful and portable ... ...of handheld computers go back to the 1960s, when Alan Kay, a researcher at Xerox`s Palo Alto Research Center, promoted the vision of a small, ... [2 rel...