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  • PCLU Privacy and Civil Liberties Unit
  • PCTDD Post Cut-Through Dialed Digits
  • PD Presidential Directive
  • PDD Presidential Decision Directive
  • PI Preliminary Investigation
  • PIA Privacy Impact Assessment
  • PG Policy Implementation Guide
  • PIOB Potential Intelligence Oversight Board
  • P.L. Public Law
  • PR Pen Register – A device which records or decodes electronic or other impulses which identify the numbers called or otherwise transmitted on the telephone line to which such device is dedicated.
  • PR/TT Pen Register/Trap and Trace
Jesse Shelley
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