View source for Daniel Murphy (computer scientist)

{{Short description|American computer scientist}}
'''Daniel L. Murphy''' is an American [[computer scientist]] notable for his involvement in the development of [[TECO (text editor)|TECO]] (an early text editor and programming language), the operating systems [[TENEX (operating system)|TENEX]] and [[TOPS-20]], and [[email]].

==Biography==
Murphy attended [[Massachusetts Institute of Technology|MIT]] from 1961 and graduated in 1965.<ref name="teco"/>
In 1962, he created the text editor [[TECO (text editor)|Text Editor and Corrector]] (TECO), later implemented on most of the [[Programmed Data Processor|PDP]] computers.<ref name="emacs" /><ref name="tops"/>
He also developed a simple software [[demand paging]] system in software for the PDP-1 while at MIT.

Murphy joined  [[BBN Technologies|Bolt, Beranek and Newman]] BBN in 1965. There he used an [[SDS 940]] computer running the [[Berkeley Timesharing System]], which provided page [[memory management]] in hardware. When the [[PDP-10]] was announced, he was one of the architects of the [[TENEX (operating system)|TENEX]] operating system developed for the custom paging hardware designed at BBN.<ref name="tomlinson" /> As part of the development of TENEX, Murphy and [[Ray Tomlinson]] wrote the original [[email]] program.<ref name="pelkey" />

In October 1972, he joined [[Digital Equipment Corporation]] where he first worked as a contractor porting TENEX to the KI10 model of the PDP-10 family. On January 2, 1973, he joined DEC as an employee, heading the team responsible for the development of the [[TOPS-20]] operating system, an evolution of TENEX for the newer models of the PDP-10 family. TOPS-20 was first marketed in 1976 on the [[DECSYSTEM-20]].<ref name="tops" />

==References==
{{Reflist|refs =

<ref name="tomlinson">{{cite journal |title= Raymond Tomlinson: Email Pioneer, Part 1 |first= Dag |last=Spicer |date= April–June 2016 |journal= IEEE Annals of the History of Computing |volume= 38 |number= 2 |pages=72–79 | doi =10.1109/MAHC.2016.25 |s2cid= 3227400 |url=https://ieeexplore.ieee.org/document/7478525 |url-access= subscription }}</ref>

<ref name="emacs">{{cite journal |title= Evolution of Emacs Lisp |first1= Stefan|last1=Monnier |first2=Michael |last2=Sperber |date= June 2020 |journal= Proceedings of the ACM on Programming Languages |volume= 4 |number= HOPL |pages=74:1–74:55 | doi = 10.1145/3386324 |doi-access= free }}</ref>

<ref name="teco">{{cite journal |title= The Beginnings of TECO |first= Dan|last= Murphy |date= October–December 2009 |journal= IEEE Annals of the History of Computing |volume= 31 |number= 4 |url= http://tenex.opost.com/anhc-31-4-anec.pdf | doi = 10.1109/mahc.2009.127 |pages=110–115|s2cid= 18805607}}</ref>

<ref name="tops">{{cite web |title= Origins and Development of TOPS-20 |year= 1996 |first= Dan|last= Murphy |url= http://tenex.opost.com/hbook.html |access-date= April 17, 2011 }}</ref>

<ref name="pelkey">{{cite book
 |last1                = Pelkey
 |first1               = James
 |year                 = 2007
 |chapter              = Arpanet: 1969–1972: The Beginnings of Computer Networks
 |title                = Entrepreneurial Capitalism and Innovation: A History of Computer Communications 1968–1988
 |url                  = http://www.historyofcomputercommunications.info/Book/4/4.8-EarlySurprises69-70.html
 |access-date           = 2020-10-06
 }}</ref>

}}

==Further reading==
* [[Daniel G. Bobrow]], Jerry D. Burchfiel, Daniel L. Murphy, [[Ray Tomlinson|Raymond S. Tomlinson]], ''[http://tenex.opost.com/tenex72.txt TENEX, A Paged Time Sharing System for the PDP-10]'' (''Communications of the ACM'', Vol. 15, pp.&nbsp;135–143, March 1972)
* {{cite journal |last1=Murphy |first1=Dan |title=TENEX and TOPS-20 |url=https://ieeexplore.ieee.org/document/7057591 |journal=IEEE Annals of the History of Computing |volume=37 |issue=1 |year=2015 |pages=75–82 |issn=1058-6180 |doi=10.1109/MAHC.2015.15|s2cid=46814551 |doi-access=free }}

==External links==
* [http://www.opost.com/dlm/ Daniel Murphy's Homepage]
* [http://tenex.opost.com/ TECO, TENEX, and TOPS-20 Papers and Pictures]

{{Authority control}}

{{DEFAULTSORT:Murphy, Daniel L.}}
[[Category:Living people]]
[[Category:American computer scientists]]
[[Category:Massachusetts Institute of Technology alumni]]
[[Category:Kernel programmers]]
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[[Category:Year of birth missing (living people)]]


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