DD

DD
    n 1: a doctor's degree in religion [syn: {Doctor of Divinity},
         {DD}]
    

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'.
    

DD

   1. <storage> {double density}.

   2. <database> {data dictionary}.

   3. <programming> {Deployment Descriptor}.

   (2005-01-26)
    

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)
    

DD
       Dansk Dataforening (org., Denmark)
       
    

DD
       Data Dictionary (SA, CASE, DB)
       
    

DD
       Double Density [disks] (FDD)
       
    

DD
       Depacketization Delay