Source : WordNet®

pdl
     n : a unit of force equal to the force that imparts an
         acceleration of 1 foot/sec/sec to a mass of 1 pound;
         equal to 0.1382 newtons [syn: {poundal}]

Source : Free On-Line Dictionary of Computing

PDL
     
        1. {Page Description Language}.
     
        2. {Program Design Language}.
     
        3. {Push Down List}.
     
        4. Dave Lebling, one of the co-authors of {Zork}.  His
        {network address} on the {ITS} machines was at one time
        .
     
        5. {Propositional Dynamic Logic}.
     
        [{Jargon File}]