Compression Systems (formerly Cooper Compression / Cooper Energy Services / Cooper Turbocompressor / Cooper), one of five organizational groups within Cameron International Corporation, is a provider of reciprocating and centrifugal compression equipment and aftermarket parts and services. Reciprocating compression equipment is used throughout the energy industry by gas transmission companies, compression leasing companies, oil and gas producers and independent power producers. Integrally geared centrifugal compressors are used by customers around the world in a variety of industries such as air separation, auto making, glass blowing, PET, petrochemical and chemical. Reciprocating compression was sold to GE Oil and Gas in June 2014.