CETME is an acronym for Centro de Estudios Técnicos de Materiales Especiales (Center for Technical Studies of Special Materials), a Spanish government design and development establishment. While being involved in many projects CETME was mostly known for its small arms research and development. The CETME rifle is its most famous project and the CETME name is most often used to refer to this rifle. CETME also designed the CETME C2 a 9mm advanced Sterling-like submachine gun, and the CETME Ameli (AMEtralladora LIgera) a light machine gun in 5.56×45mm NATO.