PCR or pcr may refer to: Science Phosphocreatine, a phosphorylated creatine molecule Principal component regression, a statistical technique Medicine Polymerase chain reaction COVID-19 testing, often performed using the polymerase chain reaction method Protein/creatinine ratio, in urine Pathologic complete response (pCR), in neoadjuvant therapy Technology Passport Carrier Release, telecommunications software Peak cell rate, on ATM networks Platform Configuration Register, a Trusted Platform Module component Program clock reference, in MPEG transport streams Processor Control Region, a Windows data structure XM PCR, a satellite receiver Political parties Parti Communiste Réunionnais or Communist Party of Réunion Partidul Comunist Român or Romanian Communist Party Partido Comunista Revolucionário or Revolutionary Communist Party Partido Cívico Renovador or Civic Renovation Party, Dominican Republic Other uses Put/call ratio, in finance Amdo Tibetan (ISO 639 code pcr), a language Germán Olano Airport (IATA code PCR), Colombia Palestinian Center for Rapprochement between Peoples, Palestine Pancritical rationalism, a development of critical rationalism and panrationalism Paul Cruickshank Racing, an Australian motor racing team Police control room, an emergency control centre Practical Chinese Reader, a textbook Production control room, of a television studio See also Partido Comunista Revolucionario (disambiguation)