Other
- Aramaic language (ISO 639-2/3 language code), a Semitic language
- Arc @ UNSW, the principal student organisation at the University of New South Wales
- Arc of the United States, a charitable organization
- Joan of Arc (c. 1410–1431), nicknamed "The Maid of Orléans" (French: Jeanne d'Arc, IPA: ; ca. 1412 – 30 May 1431), is considered a national heroine of France and a Catholic saint
- Prix de l'Arc de Triomphe, a Group 1 flat horse race
- Arc (Bahá'í), a number of administrative buildings for the Bahá'í Faith, located on Mount Carmel in Israel
- Sony Ericsson Xperia Arc, a cellphone
- Airlines Reporting Corporation, an airline-owned company that provides ticket distribution, reporting, and settlement services
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