资料来源 : pyDict

数据字典

资料来源 : WordNet®

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

资料来源 : Free On-Line Dictionary of Computing

DD
     
        1.  {double density}.
     
        2. {Data Dictionary}.
     
        [{Jargon File}]
     
        (1998-08-28)

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)