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PARC scientist Larry Tesler recalls Jobs' famous Xerox visits

Lawrence Gordon "Larry" Tesler (April 24, 1945February 16, 2020) was a computer scientist and an early employee of Apple Computer who worked on the development of the Apple Lisa and Newton.


Tesler enrolled at Stanford University in 1961 at the age of 16 and earned a degree in mathematics in 1965.[1]




Alto System Project- Larry Tesler demonstration of Gypsy

Alan Kay had worked to recruit Tesler into Xerox in the early 1970s. Tesler joined Xerox PARC in 1973, where the Xerox Alto was being developed with a pioneering graphical user interface. Tesler and colleague Tim Mott collaborated on developing the now-standard copy and paste function. When Steve Jobs and a group of Apple engineers visited the PARC facility in 1979, Tesler demonstrated the Alto to them.[1]

Apple Computer[]

Tesler and several other PARC staff joined Apple Computer in 1980.[2] Tesler became involved in the development of the Apple Lisa. [1]

When Steve Sakoman and Jean-Louis Gassée left Apple in 1980, CEO John Sculley assigned Tesler to salvage their unfinished Newton project. Tesler brought in Steve Capps who became chief architect of the mobile platform.[3] Tesler then became chief scientist of the Advanced Technology Group and left Apple in 1997.[1]


  1. 1.0 1.1 1.2 1.3 John Markoff (February 20, 2020). Lawrence Tesler, Pioneer of Personal Computing, Dies at 74. The New York Times.
  2. Luke Dormehl. "The Apple Revolution: Steve Jobs, the Counterculture and How the Crazy Ones Took over the World", Random House, 2012, pp. 163–164. 
  3. The Story Behind Apple’s Newton by Tom Hormby, Low End Mac. 2013-08-06.

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