Program Requirements Document Presidential Review Directive Personal Radiation Dosimeter Project Requirements Document Payload Retention Device Performance Requirement Document Personal Radiation Detector personnel readiness division Preamble Detector Printer Driver Pro Rata Distribution Procurement Regulation Directive Procurement Requirements Document Product Requirements Document Program Requirement Document Progress Review of Design Project Reference Data Project Requirement Document Puerto Rico Datum paired partial reaction of degeneration Partido de la Revolucin Democrtica Partners in Rural Development patient reference dosier Pearl River Delta percent rms difference percent root mean square difference percentage root-mean-square difference Performance Report Development Performance Review and Development