Arp

• 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

• Arp, Georgia
• Arp, Tennessee
• Arp, Texas

• 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

• 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.

• Active rollover protection
• Address Resolution Protocol, a communication protocol
• ARP spoofing, a networking attack
• AR-15–style pistol, a handgun with an AR-15-style receiver
• Autoradiopuhelin (car radio phone), a Finnish mobile phone network

• ARP, Aerial Rescue Platform, a type of stretcher used in helicopter rescue missions
• 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.

• AARP

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