DuckCorp Dico

Found 2 definitions

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   DD
      1. <storage> double density.
      2. <database> data dictionary.
      3. <programming> Deployment Descriptor.
      (2005-01-26)
   
                   
                 

2.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   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".
      dd had a 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.
      [Jargon File]
      (2005-08-08)