Arp

Arp or ARP may refer to:

People

 * Andrice Arp (born 1969), U.S. comics artist and illustrator
 * Bill Arp, (1826-1903) Charles Henry Smith, US writer and politician.
 * Halton Arp (1927–2013), American astronomer
 * Arp catalogue of galaxies
 * Fiete Arp (born 2000), German footballer
 * Jean Arp (1886–1966) or Hans Arp, German-French artist
 * Robert Arp (born 1970), American philosopher
 * Sophie Taeuber-Arp (1889–1943), Swiss artist
 * Arp Schnitger (1648-1719), German organbuilder

Places in the United States

 * Arp, Georgia
 * Arp, Tennessee
 * Arp, Texas

Businesses and organizations

 * ARP (laboratory) of digital humanities
 * Adaptation Reporting Power, under the UK 2008 Climate Change Act
 * Amphibious Reconnaissance and Patrol Unit, a Taiwan special forces group
 * Air Raid Precautions, a UK civil defence 1924–1946
 * Airport reference point, a designated geographical location
 * Anti-Revolutionary Party (Dutch Anti-Revolutionaire Partij), a defunct Dutch political party
 * Assembly of the Representatives of the People, Tunisian government
 * Associate Reformed Presbyterian Church, US
 * Association for Research in Personality, US

Music

 * ARP Instruments, Inc., a former electronic musical instrument maker
 * Arpeggiator, on sound synthesizers and electronic organs
 * "Arp", a song by Apoptygma Berzerk The Apopcalyptic Manifesto
 * "Arp", a song by Arcane Roots from Melancholia Hymns
 * "Faust Arp", a song by Radiohead from their album In Rainbows
 * "Arp #1", a song by French artist Jackson and His Computerband from his album Glow. It features in 2013's Grand Theft Auto V on Soulwax FM.

Technology

 * Active rollover protection
 * Address Resolution Protocol, a communication protocol
 * ARP spoofing, a networking attack
 * Autoradiopuhelin (car radio phone), a Finnish mobile phone network

Other uses

 * American Rescue Plan Act of 2021
 * arp, the ISO 639-3 code for the Arapaho language, a Native American language
 * Arp, a rosemary cultivar
 * arp, actin-related protein (e.g. Arp10)
 * Arp2/3 complex, a protein
 * Arc routing, where ARP refers to Arc Routing Problem.