PSR may refer to:
Organizations Pacific School of Religion, Berkeley, California, US Palestinian Center for Policy and Survey Research Payment Systems Regulator in the United Kingdom Physicians for Social Responsibility, US
Political parties Party of Socialists-Revolutionaries, a major socialist political party in the late Russian Empire Polish Reason of State (), a minor Polish political party active between 2003 and 2005 Revolutionary Socialist Party (Portugal) (), a former Trotskyist party Romanian Socialist Party (present-day) ()
Places Abruzzo Airport (IATA airport code), near Pescara, Italy Pasir Ris MRT station (MRT station abbreviation), Singapore Pioneer Scout Reservation, a Boy Scout camp in Ohio, US
Science and technology Pulsar, a kind of star Permanently shadowed region of a body in the Solar System Primary radar Perimeter surveillance radar Posthumous sperm retrieval, from dead men
Computing PHP Standard Recommendation Predictive state representation of a system Problem Steps Recorder, psr.exe, a Microsoft utility Panel self-refresh, in Embedded DisplayPort
Law enforcement and military US Precision Sniper Rifle PSR-90, a Pakistani precision sniper rifle
Other uses Portuguese Sign Language (ISO 639-3 language code) Potential support ratio, in demographics Precision scheduled railroading Price–sales ratio of stocks Primitive Survival Rating, on the Discovery Channel TV series Naked and Afraid Principle of sufficient reason Profit and Sustainability Rules, in association football