Linked from
The 17 pages that link to Compressor, each with the reason it gives.
Brayton cycleRelated: The cycle begins by consuming work to compress its working gas.
Jet engineBroader topic: It increases incoming air pressure before combustion.
Aircraft engineRelated: Gas turbine engines compress incoming air before combustion.
EvaporatorRelated: It draws vapor from the evaporator outlet and drives refrigerant circulation.
TurboshaftBroader topic: It pressurizes incoming air before combustion in a turboshaft.
Gas-turbine engineNarrower topic: Compression raises air pressure before it enters the combustor.