What does prl stand for?

Parallel (ELAL)

Pearl (VRA)

Aviaprima - Russian Federation - ICAO designator (FAAC)

Pacht, Ross et Al, Los Angeles, CA - OCLC symbol (OCLC)

Package Research Laboratory (SAUS)

Page Revision Log (NASA)

Parallel (MSA)

Partido Radical Liberal - Radical Liberal Party - Ecuador - Political party

Parti Reformateur Liberal - Liberal Reform Party - Belgium - Political party (PPW)

Parti Republicain de la Liberte - Republican Party for Liberty - France - Political party (PPE)

Parti Republicain de la Liberte - Republican Party for Liberty - Burkina Faso - Political party

Parts Requirement List (KSC)

Paul Revere - NYSE symbol (SPSG)

Peace Research Laboratory - Later, LPRL - An association (EA)

Penn Eastern Rail Lines - Federal Railroad Administration identification code

Periodical (SAUS)

Periodical Requirements (SAUS)

Personnel Research Laboratory - Lackland Air Force Base, TX

Peruvian Sign Language - Language code (ETLW)

Pesticide Research Laboratory and Graduate Study Center - Pennsylvania State University - Research center (RCD)

Petroleum Refining Laboratory - Pennsylvania State University (MCD)

Philco Resources - Vancouver Stock Exchange symbol

Philips Research Laboratories (NITA)

Photoreactivating Light

Physical Research Laboratory (CARB)

Physical Review Letters - A publication

Physiological Research Laboratories - University of California at San Diego - Research center

Pick-Resistant Lock (SAUS)

Pioneering Research Laboratory - Massachusetts - Army

Planning Requirements List (MCD)

Plant Research Laboratory - Michigan State University (RCD)

Plastics Research Laboratory - MIT (MCD)

Polar Research Laboratory - USA - Marine science

Polished-Rod Load (SAUS)

Political Risk Letter - Database - Frost & Sullivan, Inc. - Information service or system (CRD)

Population Research Laboratory - University of Alberta - Research center (RCD)

Postal Reform League (IAA)

Prairie Research Laboratory (SAUS)

Preamble

Precision Reduction Laboratory (AFM)

Predicted Repair Level (MCD)

Pressure Ratio Limiter (MCD)

Price Reduction League (SAUS)

Princes Risborough Laboratory (SAUS)

Print Lister (VLIE)

Priority Rate Limiting (MCD)

Private Relocatable Library (SAUS)

Processor Level (VLIE)

Professional Ordnance - NCIC firearms make code (NCIC)

Programming Research Ltd. (SAUS)

Program Reference Library (VLIE)

Progressive Republican League

Project Records List (SAUS)

Project Research Laboratory

Prolactin - Also, LTH, PR - Endocrinology

Prolong International - AMEX symbol (SPSG)

Prolong International Corp. - AMEX symbol

Properties Research Laboratory - Purdue University - Lafayette, IN

Propulsion Research Laboratory

Proton Reference Level - Chemistry

Publication Requirements List (SAUS)

Publications Requirements List (NG)

Pulse Reflection Logic (SAUS)

Pulse-Reflection Logic (IAA)

Prolactin (STED)