Editing Incompatible Timesharing System (section)

==References==
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=== Bibliography ===
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* [https://web.archive.org/web/20050308214647/http://zane.brouhaha.com/~healyzh/_info_/its.primer An Introduction to ITS for the MACSYMA User]
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* {{cite journal |last=Lin |first=Yuwei |date=February 24, 2004 |url=http://ubiquity.acm.org/article.cfm?id=985611 |title=Epistemologically Multiple Actor-Centered Systems: or, EMACS At Work |journal=Ubiquity |publisher=[[Association for Computing Machinery]] |volume=5 |issue=1 |access-date=December 21, 2009 }}
* {{Cite web |last1=Chiou |first1=Stefanie |last2=Music |first2=Craig |last3=Sprague |first3=Kara |last4=Wahba |first4=Rebekah |date=December 16, 2001 |url=http://mit.edu/6.933/www/Fall2001/AILab.pdf |title=A Marriage of Convenience: The Founding of the MIT Artificial Intelligence Laboratory |access-date=December 21, 2009 |archive-date=May 14, 2011 |archive-url=https://web.archive.org/web/20110514101306/http://mit.edu/6.933/www/Fall2001/AILab.pdf |url-status=dead }}
* {{cite book |last=Williams |first=Sam |year=2002 |url=https://archive.org/details/freeasinfreedomr00will |title=Free as in Freedom: Richard Stallman's Crusade for Free Software |isbn=978-0-596-00287-9 |location=Petaluma, CA |publisher=[[O'Reilly Media|O'Reilly]] |access-date=December 21, 2009 |url-access=registration }}
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