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Encyclopedia > Qed text editor

QED is a line-oriented computer text editor.


Originally written by Butler Lampson and L. Peter Deutsch for the SDS 940, probably in 1966. Ken Thompson later wrote a version for CTSS; this version was notable for introducing regular expressions. QED influenced the classic UNIX text editor ed and the less well known sam by Rob Pike. A Canadian version of QED named FRED (Friendly Editor) was written at the University of Waterloo for Honeywell GCOS systems by Peter Fraser.


See also: QED for other uses of "QED".


External links

  • History of QED (http://cm.bell-labs.com/cm/cs/who/dmr/qed.html)
  • FRED - the friendly editor. (http://www.thinkage.ca/english/gcos/expl/fred/expl.html)

  Results from FactBites:
 
History of QED (1312 words)
The QED text editor was first written by Butler Lampson and Peter Deutsch for the Berkeley time-sharing system on the SDS 940; see their paper in C. #12 (December, 1967).
Ken's CTSS qed adopted from the Berkeley one the notion of multiple buffers to edit several files simultaneously and to move and copy text among them, and also the idea of executing a given buffer as editor commands, thus providing programmability.
A traditional (and maybe the nicest) version of QED was done at the University of Toronto by Tom Duff, Rob Pike, Hugh Redelmeier, and David Tilbrook; it supports multiple buffers, execution of buffers, and regular expressions with back-referencing.
  More results at FactBites »


 

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