ARC
- A.R.C. (album)
- AIDS-related complex
- APEXC
- ARC (file format)
- ARC (processor)
- ARC (protein)
- ARC Association for Real Change
- ARC Diversified
- ARC Document Solutions
- ARC Europe
- ARC Macro Language
- ARC Magazine
- ARC Raiders
- ARC Resources
- ARC fusion reactor
- ARC triangle
- ARC-AGI
- ARC/Architectural Resources Cambridge, Inc.
- ARCS (disambiguation)
- ARChive of Contemporary Music
- ARQ (disambiguation)
- Abortion Rights Campaign
- Academy of Richmond County
- Access to the Region's Core
- Activity relationship chart
- Adaptive replacement cache
- Adelaide Rowing Club
- Administrative Reform Council
- Administrative Reforms Commission
- Advance reading copy
- Advanced RISC Computing
- Advanced Resource Connector
- African Rainforest Conservancy
- African Rally Championship
- Agricultural Research Council
- Agulhas Return Current
- Aircraft Radio Corporation
- Airlines Reporting Corporation
- Airport Regions Conference
- Alarm monitoring center
- Alberta Research Council
- Alien Resident Certificate
- Alien registration card (Japan)
- Alignment Research Center
- Allergic rhinoconjunctivitis
- Alliance Rose Croix
- Alliance for Responsible Citizenship
- Alliance of Reformed Churches
- Alliance of Religions and Conservation
- Alpha Rho Chi
- Amalgamated Roadstone Corporation
- American Record Company
- American Record Corporation
- American Red Cross
- American Refugee Committee
- American River College
- American Rivers Conference
- American Rocketry Challenge
- Americas Rugby Championship
- Ames Research Center
- Amey Roadstone Construction
- Anaheim Rapid Connection
- Anteater Recreation Center
- Anti-Recidivism Coalition
- Anti-reflective coating
- Apache Point Observatory
- Appalachian Regional Commission
- Aqaba Railway Corporation
- Aramaic Wikipedia
- Aramaic language
- Arc (web browser)
- Arc of the United States
- Arch (disambiguation)
- Archaeological Review from Cambridge
- Arcuate nucleus (hypothalamus)
- Arena Racing Company
- Ark (disambiguation)
- Army Reconnaissance Course
- Art Renewal Center
- Arthritis Research Campaign
- Astrophysical Research Consortium
- Athletics–Recreation Center
- Atlanta Regional Commission
- Atlanta Rowing Club
- Atlantic Rally for Cruisers
- Attack Retrieve Capture
- Auckland Regional Council
- Audio Return Channel
- Augmentation Research Center
- Augmented renal clearance
- Australian Rally Championship
- Australian Red Cross
- Australian Research Council
- Australian Rugby Championship
- Authenticated Received Chain
- Autism Resource Centre (Singapore)
- Automatic Reference Counting
- Automation and Remote Control
- Autonomous Republic of Crimea
- Aviation Research Centre
- Canada Revenue Agency
- Canadian artist-run centres
- Clone trooper
- Colombian Navy
- Doom Eternal
- Google App Runtime for Chrome
- Intel Arc
- List of auxiliaries of the United States Navy
- National Archives and Records Administration
- Royal Canadian Air Force
- SV ARC
- Society for the Arts, Religion and Contemporary Culture
- Synopsys
- WWMT