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

  GREP
         Global Regular Expression Print (Unix)
         

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

  grep
   /grep/, vi.
  
      [from the qed/ed editor idiom g/re/p, where re stands for a regular
      expression, to Globally search for the Regular Expression and Print the
      lines containing matches to it, via Unix grep(1)] To rapidly scan a file
      or set of files looking for a particular string or pattern (when browsing
      through a large set of files, one may speak of grepping around). By
      extension, to look for something by pattern. ?Grep the bulletin board for
      the system backup schedule, would you?? See also vgrep.
  
      [It has been alleged that the source is from the title of a paper ?A
      General Regular Expression Parser?, but dmr confirms the g/re/p etymology
      --ESR]
  

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

  grep
  
       A Unix command for
     searching files for lines matching a given regular
     expression (RE).  Named after the qed/{ed} editor
     subcommand "g/re/p", where re stands for a regular expression,
     to Globally search for the Regular Expression and Print the
     lines containing matches to it.  There are two other variants,
     fgrep which searches only for fixed strings and egrep which
     accepts extended REs but is usually the fastest of the three.
  
     Used by extension to mean "to look for something by pattern".
     When browsing through a large set of files, one may speak of
     "grepping around".  "Grep the bulletin board for the system
     backup schedule, would you?"  See also vgrep.
  
     [{Jargon File]
  

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