Arx, ARX, or ArX may refer to: * ARX (Algorithmic Research Ltd.), a digital security company *

ARX (gene) Aristaless related homeobox is a protein that in humans is encoded by the ''ARX'' gene. Function This gene is a homeobox-containing gene expressed during development. The expressed protein contains two conserved domains, a C-peptide (or arist ...

, Aristaless related homeobox * ARX (operating system), an operating system * Arx (Roman), a Roman citadel, and in particular: **The northern hump of the two forming the Capitoline Hill of ancient Rome * Arx, Landes, a commune of the Landes ''département'' in France *'' Arx Fatalis'', a first person role-playing game developed by Arkane Studios in 2002 *''Arx'', a sculpture by Lars Vilks * Americas Rallycross Championship, also known as ARX Rallycross *Add-Rotate-XOR; see block cipher * (1922-1988), mycologist from the Netherlands

See also