ARCS may stand for:
- 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
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