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PPN
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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.
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