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3 definitions found
 for foobar
From V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016) :

  FOOBAR
         FTP Operation Over Big Address Records (RFC 1639, FTP)
         

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

  foobar
   n.
  
      [very common] Another widely used metasyntactic variable; see foo for
      etymology. Probably originally propagated through DECsystem manuals by
      Digital Equipment Corporation ({DEC) in 1960s and early 1970s; confirmed
      sightings there go back to 1972. Hackers do not generally use this to mean
      FUBAR in either the slang or jargon sense. See also Fred Foobar. In
      RFC1639, ?FOOBAR? was made an abbreviation for ?FTP Operation Over Big
      Address Records?, but this was an obvious backronym. It has been
      plausibly suggested that ?foobar? spread among early computer engineers
      partly because of FUBAR and partly because ?foo bar? parses in electronics
      techspeak as an inverted foo signal; if a digital signal is active low (so
      a negative or zero-voltage condition represents a "1") then a horizontal
      bar is commonly placed over the signal label.
  

From The Free On-line Dictionary of Computing (30 December 2018) :

  foobar
  
      Another common metasyntactic variable; see foo.
     Hackers do *not* generally use this to mean FUBAR in either
     the slang or jargon sense.
  
     According to a german correspondent, the term was coined
     during WW2 by allied troops who could not pronounce the german
     word "furchtbar" (horrible, terrible, awful).
  
     [{Jargon File]
  
     (2003-07-03)
  

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