版面描語言
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}]
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}]