= P =
PPN /P-P-N/, /pip'n/ n. obs.
[from `Project-Programmer Number'] A user-ID under TOPS-10 and its various mutant progeny at SAIL, BBN, CompuServe, and elsewhere. Old-time hackers from the PDP-10 era sometimes use this to refer to user IDs on other systems as well.
--The Jargon File version 4.3.1, ed. ESR, this entry manually entered by rootbeer277.