Cer, or CER may refer to: Environment Certified Emission Reduction, emission units Statistics Control event rate, a statistical value in epidemiology Crossover error rate, a statistical value in a biometric system Information technology Canonical Encoding Rules, encoding format Customer edge router, in computer networking CER Computer (Serbian Latin: Cifarski Elektronski Računar, "Digital Electronic Computer"), series of early computers Geography Cer (mountain), a mountain in Serbia Cer, Zvornik, a village in the municipality of Zvornik, Republika Srpska, Bosnia and Herzegovina Cer, Kičevo, a village in the municipality of Kičevo, North Macedonia Cherbourg – Maupertus Airport or Aéroport de Cherbourg - Maupertus, an airport in France by IATA airport code Chinese Eastern Railway (Chinese: 中東鐵路/中东铁路, also known as the Chinese Far East Railway), a railway in northeastern China Religion Keres, Greek goddess of violent death, one of the Greek primordial deities Medicine Comparative effectiveness research, comparison of health care intervention effectiveness Conditioned emotional response, a specific learned behavior or a procedure Sports Classic Endurance Racing, a sports car racing series founded in 2004 by Peter Auto Ltd. Organizations and trade agreements Conference of European Rabbis, rabbinical alliance in Europe Closer Economic Relations, a free trade agreement between Australia and New Zealand Commission for Energy Regulation, a Republic of Ireland energy regulator Community of European Railway and Infrastructure Companies, railway system Broadcasting Astro Ceria Malaysian pay-channel 611 Publications Comparative Education Review, publication of the Comparative and International Education Society Finance Currency exchange rate, rate at which one currency will be exchanged for another currency