PPN

/pip'n/ or /P-P-N/

[from 'Project-Programmer Number']

n. 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.

©MMXXII CATENCODE