ARCS

ARCS may stand for:
 * ARCS Foundation (Achievement Rewards for College Scientists)
 * Alabama Regional Communications System, a radio/alert notification communications district in the State of Alabama
 * Associate of the Royal College of Science
 * ARCS (computing), a firmware bootloader
 * Admiralty Raster Chart Service
 * Alaska Rural Communications Service
 * Anglia Regional Co-operative Society, a consumer co-operative in the UK
 * Wide Angular-Range Chopper Spectrometer, a spectrometer at the Spallation Neutron Source
 * Archaeosine synthase, an enzyme