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English Dictionary: DD by the DICT Development Group
4 results for DD
From WordNet (r) 3.0 (2006) [wn]:
DD
<dd style="margin-left:1em">n
  1. a doctor's degree in religion [syn: Doctor of Divinity, DD]
From Jargon File (4.2.0, 31 JAN 2000) [jargon]:
   dd /dee-dee/ vt.   [Unix: from IBM {JCL}] Equivalent to {cat} or
   {BLT}.   Originally the name of a Unix copy command with special
   options suitable for block-oriented devices; it was often used in
   heavy-handed system maintenance, as in "Let's `dd' the root
   partition onto a tape, then use the boot PROM to load it back on to
   a new disk".   The Unix `dd(1)' was designed with a weird, distinctly
   non-Unixy keyword option syntax reminiscent of IBM System/360 JCL
   (which had an elaborate DD `Dataset Definition' specification for
   I/O devices); though the command filled a need, the interface design
   was clearly a prank.   The jargon usage is now very rare outside Unix
   sites and now nearly obsolete even there, as `dd(1)' has been
   {deprecated} for a long time (though it has no exact replacement).
   The term has been displaced by {BLT} or simple English `copy'.
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   DD
  
      1. {double density}.
  
      2. {Data Dictionary}.
  
      [{Jargon File}]
  
      (1998-08-28)
  
  

From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   dd
  
      A {Unix} copy command with special options suitable for
      block-oriented devices; it was often used in heavy-handed
      system maintenance, as in "Let's "dd" the {root partition}
      onto a tape, then use the {boot PROM} to load it back on to a
      new disk".
  
      The Unix "dd" was designed with a weird, distinctly non-Unixy
      keyword option syntax reminiscent of {IBM} {System/360} JCL
      (which had an elaborate DD "Dataset Definition" specification
      for I/O devices); though the command filled a need, the
      interface design was clearly a prank.
  
      The jargon usage is now very rare outside Unix sites and now
      nearly obsolete even there, as "dd" has been {deprecated} for
      a long time (though it has no exact replacement).   The term
      has been displaced by {BLT} or simple English "copy".
  
      [{Jargon File}]
  
      (1995-02-03)
  
  
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