“The pdl seems in total disarray,” says Federigo Argentieri, professor of political science at John Cabot University in Rome.
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 pdl@dms. 5. Propositional Dynamic Logic. [Jargon File]