Education
* Alpha Rho Upsilon, a defunct fraternity in the United States *Places
* Aru Islands Regency, a group of islands and the regency in the Moluccas * Aru, Democratic Republic of Congo, a town in Ituri province * Aru, Harju County, village in Kuusalu Parish, Harju County, Estonia * Aru, Saare County, village in Saare Parish, Saare County, Estonia * Aru, Kohgiluyeh and Boyer-Ahmad, village in Gachsaran County, Kohgiluyeh and Boyer-Ahmad Province, Iran * Aru, Basht, village in Basht County, Kohgiluyeh and Boyer-Ahmad Province, Iran * Aru, Damavand, village in Damavand County, Tehran Province, Iran * Aru, Firuzkuh, village in Firuzkuh County, Tehran Province, Iran * Aru, Jammu and Kashmir, village in India * Aruba, IOC and UNDP country code ARUSports
* Fabio Aru, Italian cyclist * Army Rugby Union, organizational body for rugby union in the British Army * Australian Rugby Union, former name ofTechnology
* Automated response unit, a telecommunications device * Autonomous Recording Unit, an audio recording devicePeople
* Ines Aru (born 1939), Estonian actress * Krista Aru (born 1958), Estonian historian, museologist and politician * Peep Aru (born 1953), Estonian politician * Aru Tateno (born 1997), Japanese ice dancer * Aru Krishansh Verma (born 1986), Indian actorOther uses
* American Railway Union, an industrial union in the United States * Aquarium Rescue Unit, an American jazz-rock band * Araçatuba Airport, IATA airport code * Arundel railway station, a railway station in England (National Rail code ARU) * Aru language (disambiguation) *