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They used the " PM1 " CPU board , which was a variant of the board that was used in Stanford University 's SUN workstation and later in the Sun-1 workstation from Sun Microsystems .
 Stanford University, Sun Microsystems
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stanford University, Sun Microsystems