initialism of reanimación cardiopulmonar (“cardiopulmonary resuscitation”): CPR; initialism of reacción en cadena de la polimerasa (“polymerase chain reaction”): PCR
a state-owned company that managed the Spanish railway network (both the infrastructure and the trains running on it) from 1941 to 2005; alternative letter-case form of Renfe (the current state-owned company that runs trains in Spain)
DPRK (initialism of República Popular Democrática de Corea (“Democratic People's Republic of Korea”), official name of North Korea: a country in East Asia)