Arx, ARX, or ArX may refer to:
Arxivar is a Document Management and Business Process Management system for Microsoft Windows used to store, share and manage electronic documents.
Arxama ochracealis is a moth in the Crambidae family. It was described by George Hampson in 1906. It is found on Borneo.
The arXiv (pronounced "archive") is a repository of electronic preprints, known as e-prints, of scientific papers in the fields of mathematics, physics, astronomy, computer science, quantitative biology, statistics, and quantitative finance, which can be accessed online.
Arx Fatalis is a partially open source first-person role-playing video game for the Xbox and Microsoft Windows, released on November 2002 by Arkane Studios, a video game developer based in Lyon, France.
Arx Pax Labs, Inc. is a Silicon Valley technology company that invented Magnetic Field Architecture (MFA) technology and a three-part foundation system for safer building in flood zones and coastal areas.
Arxel Tribe is an international video game and multimedia company, founded by Slovene architects Matjaž Požlep and Diego Zanco in 1991. The company is now known as The Arxel Guild.
Arxama atralis is a moth in the Crambidae family. It was described by Hampson in 1897. It is found in Malaysia.
Arxan Technologies is an American technology company specializing in Application Attack Prevention and Self-Protection solution for IoT, Mobile, and other applications.
ARX (Algorithmic Research Ltd.) is a digital security company headquartered in San Francisco, CA, with offices in the UK, the Netherlands, Australia and Israel.