ARC
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Business
- Aircraft Radio Corporation, a major avionics manufacturer from the 1920s to the '50s
- Airlines Reporting Corporation, an airline-owned company that provides ticket distribution, reporting, and settlement services
- Airport Regions Conference, a European organization of major airports
- Alignment Research Center, an AI alignment research organization
- Amalgamated Roadstone Corporation, a British stone quarrying company
- American Record Company (1904–1908, re-activated 1979), one of two United States record labels by this name
- American Record Corporation (1929–1938), a United States record label also known as American Record Company
- ARC (American Recording Company) (1978-present), a vanity label for Earth, Wind & Fire
- ARC Document Solutions, a company based in California, formerly American Reprographics Company
- Amey Roadstone Construction, a former British construction company
- Aqaba Railway Corporation, a freight railway in Jordan
- ARC/Architectural Resources Cambridge, Inc., Cambridge, Massachusetts
- ARC Diversified, a Cookeville, Tennessee non-profit that employs the severely disabled
- ARC International, a computer processor designer, and a subsidiary of Synopsys
- ARC Resources, a Canadian oil and natural gas company
- Arena Racing Company, a British racecourse owning group
Computing
- Adaptive replacement cache, a cache management algorithm
- Advanced Resource Connector, middleware for computational grids
- Advanced RISC Computing, a specification
- Google App Runtime for Chrome, a compatibility layer and sandboxing technology to run Android applications on Chromebook computers
- ARC (file format), a lossless data compression and archival file format
- Automatic Relay Computer, an early electromechanical computer
- ARC (processor), a family of embedded microprocessors
- ARC Macro Language, a high-level algorithmic language
- Audio Return Channel, a feature of HDMI 1.4
- Authenticated Received Chain, an email authentication system
- Automatic Reference Counting, an Objective-C and Swift memory management feature
- Intel Arc, a brand of graphics processing units designed by Intel
- Arc (web browser), a chromium based web browser "reimagination" released in 2022 with a focus on modern design
Culture
- Advance reading copy of a book, for reviewers, librarians, and booksellers
- A.R.C. (album), a 1971 album by Chick Corea, Dave Holland, and Barry Altschul
- ARC Europe, association of motoring clubs
- ARChive of Contemporary Music, a music repository in New York City, US
- ARC Magazine (Art. Recognition. Culture.), Caribbean
- Art Renewal Center, online realist art museum
- Canadian artist-run centres
Government and politics
- Administrative Reforms Commission, an Indian Government commission
- Administrative Reform Council, the military regime that governed Thailand following the 2006 coup d'état
- Script error: No such module "Lang"., the French-language name for the Canada Revenue Agency
- Alien registration card (Japan), for foreign residents of Japan
- Alien Resident Certificate, for foreign residents of Taiwan
- Appalachian Regional Commission, a United States federal-state partnership
- Atlanta Regional Commission, a regional planning and intergovernmental coordination agency
- Auckland Regional Council, a former New Zealand local government entity
- Australian Research Council, a government agency for allocating research funding
- Autonomous Republic of Crimea, an internationally recognized autonomous republic in Ukraine
- Script error: No such module "Lang"., the French-language name for the Royal Canadian Air Force
Humanitarian, activist and religious organizations
- Abortion Rights Campaign, Ireland
- African Rainforest Conservancy
- Alliance for Responsible Citizenship
- Alliance of Reformed Churches
- Alliance of Religions and Conservation, UK
- American Red Cross
- American Refugee Committee
- Anti-Recidivism Coalition, Los Angeles, US
- ARC Association for Real Change, of UK providers of services to people with a learning disability
- Arc of the United States
- Arthritis Research Campaign, UK
- Australian Red Cross
- Autism Resource Centre (Singapore), a Singapore-based non-profit organisation
- Society for the Arts, Religion and Contemporary Culture, US
- Alliance Rose Croix, another name for the Order of the Solar Temple
Research and science
- Agricultural Research Council, a former British organisation that funded agricultural research
- Agulhas Return Current, an ocean current in the Indian Ocean
- AIDS-related complex, a condition in which antibody tests are positive for HIV
- Alberta Research Council, government funded applied R&D corporation
- Allergic rhinoconjunctivitis, inflammation of the conjunctiva and nose due to allergy
- American Rocketry Challenge, an American model rocketry competition for high school students
- Ames Research Center, a NASA facility located at Moffett Federal Airfield, California
- ARC fusion reactor, Affordable, Robust Compact reactor, a reactor design from MIT
- ARC (protein) (activity-regulated cytoskeleton-associated protein)
- Archaeological Review from Cambridge, a UK journal
- Archival Research Catalog, National Archives and Records Administration catalog
- Arcuate nucleus (hypothalamus), an aggregation of neurons in the mediobasal hypothalamus
- Arthritis Research Campaign, a British medical research charity
- Astrophysical Research Consortium, the organization that operates the Apache Point Observatory
- Augmentation Research Center, a center founded by electrical engineer Douglas Engelbart
- Augmented renal clearance, a pharmacokinetic consideration in critically ill persons
- Australian Research Council, the Australian Government's main research funding body for tertiary institutions
- Automation and Remote Control, a Russian periodical
- Aviation Research Centre, a part of the Research and Analysis Wing (R&AW) of the Cabinet Secretariat, India
Sports
- Adelaide Rowing Club, in Adelaide, South Australia
- African Rally Championship, international automobile rally
- Anteater Recreation Center, an indoor gym at the University of California, Irvine
- American Rivers Conference, an NCAA Division III athletic conference operating mainly in Iowa with one member in Nebraska
- Americas Rugby Championship
- SV ARC (Alphense Racing Club), Alphen aan den Rijn, Netherlands, a Dutch football club
- Athletics–Recreation Center, a 5,000-seat multi-purpose arena on the campus of Valparaiso University in Valparaiso, Indiana
- Atlanta Rowing Club, Roswell, Georgia
- Atlantic Rally for Cruisers, a transatlantic sailing competition
- Australian Rally Championship
- Australian Rugby Championship (August–October 2007), rugby union
Other uses
- Advanced Recon Commandos (ARC troopers), a variant of clone trooper in the Star Wars franchise
- Anti-reflective coating
- American River College, Sacramento County, California, US
- Academy of Richmond County, Augusta, Georgia, US
- Access to the Region's Core, cancelled commuter rail project, New York, US
- Anaheim Rapid Connection, a proposed streetcar line
- Activity relationship chart, of closeness between activities
- A US Navy hull classification symbol: Cable repair ship (ARC)
- Army Reconnaissance Course, US Army Armor School, Fort Knox, Kentucky
- ARC (Callsign), Colombian Navy abbreviation and ship prefix
- ARC triangle, Affinity, Reality and Communication, in Scientology
- Attack Retrieve Capture, a computer game
- arc, the ISO 639-2 code for the Aramaic language
- Aramaic Wikipedia, which uses "arc" as its url prefix
- Alarm monitoring center, also known as alarm receiving center (ARC)
- ARC West Michigan, an independent digital subchannel of WWMT in Kalamazoo, Michigan