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3 definitions found
 for TECO
From V.E.R.A. -- Virtual Entity of Relevant Acronyms (September 2014) :

  TECO
         Tape / Text Editor and COrrector (MIT)
         

From The Jargon File (version 4.4.7, 29 Dec 2003) :

  TECO
   /tee'koh/, n.,v. obs.
  
      1. [originally an acronym for ?[paper] Tape Editor and COrrector?; later,
      ?Text Editor and COrrector?] n. A text editor developed at MIT and modified
      by just about everybody. With all the dialects included, TECO may have been
      the most prolific editor in use before EMACS, to which it was directly
      ancestral. Noted for its powerful programming-language-like features and
      its unspeakably hairy syntax. It is literally the case that every string
      of characters is a valid TECO program (though probably not a useful one);
      one common game used to be mentally working out what the TECO commands
      corresponding to human names did.
  
      2. vt. Originally, to edit using the TECO editor in one of its infinite
      variations (see below).
  
      3. vt.,obs. To edit even when TECO is not the editor being used! This usage
      is rare and now primarily historical.
  
      As an example of TECO's obscurity, here is a TECO program that takes a list
      of names such as:
  
  
      Loser, J. Random
      Quux, The Great
      Dick, Moby
  
      sorts them alphabetically according to surname, and then puts the surname
      last, removing the comma, to produce the following:
  
  
      Moby Dick
      J. Random Loser
      The Great Quux
  
      The program is
  
  
      [1 J^P$L$$
      J <.-Z; .,(S,$ -D .)FX1 @F^B $K :L I $ G1 L>$$
  
      (where ^B means ?Control-B? (ASCII 0000010) and $ is actually an alt or
      escape (ASCII 0011011) character).
  
      In fact, this very program was used to produce the second, sorted list from
      the first list. The first hack at it had a bug: GLS (the author) had
      accidentally omitted the @ in front of F^B, which as anyone can see is
      clearly the Wrong Thing. It worked fine the second time. There is no
      space to describe all the features of TECO, but it may be of interest that
      ^P means ?sort? and J<.-Z; ... L> is an idiomatic series of commands for
      ?do once for every line?.
  
      In mid-1991, TECO is pretty much one with the dust of history, having been
      replaced in the affections of hackerdom by EMACS. Descendants of an early
      (and somewhat lobotomized) version adopted by DEC can still be found
      lurking on VMS and a couple of crufty PDP-11 operating systems, however,
      and ports of the more advanced MIT versions remain the focus of some
      antiquarian interest. See also retrocomputing, write-only language.
  

From The Free On-line Dictionary of Computing (18 March 2015) :

  TECO
  
      /tee'koh/ (Originally an acronym for "[paper]
     Tape Editor and COrrector"; later, "Text Editor and
     COrrector"]) A text editor developed at MIT and modified
     by just about everybody.  With all the dialects included, TECO
     may have been the most prolific editor in use before Emacs,
     to which it was directly ancestral.  The first Emacs editor
     was written in TECO.
  
     It was noted for its powerful programming-language-like
     features and its unspeakably hairy syntax (see write-only
     language).  TECO programs are said to resemble line noise.
     Every string of characters is a valid TECO program (though
     probably not a useful one); one common game used to be predict
     what the TECO commands corresponding to human names did.
  
     As an example of TECO's obscurity, here is a TECO program that
     takes a list of names such as:
  
     	Loser, J. Random
     	Quux, The Great
     	Dick, Moby
  
     sorts them alphabetically according to surname, and then puts
     the surname last, removing the comma, to produce the
     following:
  
     	Moby Dick
     	J. Random Loser
     	The Great Quux
  
     The program is
  
     	[1 J^P$L$$
     	J <.-Z; .,(S,$ -D .)FX1 @F^B $K :L I $ G1 L>$$
  
     (where ^B means "Control-B" (ASCII 0000010) and $ is actually
     an alt or escape (ASCII 0011011) character).
  
     In fact, this very program was used to produce the second,
     sorted list from the first list.  The first hack at it had a
     bug: GLS (the author) had accidentally omitted the "@" in
     front of "F^B", which as anyone can see is clearly the Wrong
     Thing.  It worked fine the second time.  There is no space to
     describe all the features of TECO, but "^P" means "sort" and
     "J<.-Z; ... L>" is an idiomatic series of commands for "do
     once for every line".
  
     By 1991, Emacs had replaced TECO in hacker's affections but
     descendants of an early (and somewhat lobotomised) version
     adopted by DEC can still be found lurking on VMS and a
     couple of crufty PDP-11 operating systems, and ports of
     the more advanced MIT versions remain the focus of some
     antiquarian interest.
  
     See also retrocomputing.
  
     ftp://usc.edu/)">(ftp://usc.edu/)+for+VAX/{VMS">ftp://usc.edu/)">(ftp://usc.edu/) for VAX/{VMS, Unix, MS-DOS,
     Macintosh, Amiga.
  
     [Authro?  Home page?]
  
     (2001-03-26)
  

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