Arp

Arp or ARP may refer to:

People

• Andrice Arp (born 1969), U.S. comics artist and illustrator
• Bill Arp (1826-1903) Nom de plume for Charles Henry Smith, an American writer and politician.
• Halton Arp (1927–2013), American astronomer
  • Arp number, a numbering system for galaxies, designed by Halton Arp
• Jean Arp (1886–1966), German-French artist
• Sophie Taeuber-Arp (1889–1943), Swiss artist

Businesses and organizations

• ARP (laboratory), a software-development group for digital humanities
• Adaptation Reporting Power, a provision and reports under the UK 2008 Climate Change Act
• Air Raid Precautions, a British civil-defence organisation (1924–1946)
• Airport reference point, the approximate geometric center of all usable runways of an airport
• Anti-Revolutionary Party (Dutch Anti-Revolutionaire Partij), a defunct (1879–1980) Dutch political party
• Area redevelopment plan, an urban planning tool provided in the Alberta Municipal Government Act

Music

• ARP (band), consisting of Mark Rae and Rhys Adams
• ARP Instruments, Inc., early manufacturer of electronic music synthesizers
  • ARP synthesizers, any synthesizer manufactured by ARP Instruments, Inc
• Arpeggio, a musical technique where notes in a chord are played or sung in sequence

Technology

• Active rollover protection
• Address Resolution Protocol, a computer networking protocol
  • ARP spoofing, a networking attack on Address Resolution Protocol
• Aerospace Recommended Practice, in Society of Automotive Engineers#Aerospace standards
• Autoradiopuhelin ("car radio phone"), in Finland, the first commercially operated public mobile phone network

Other uses

• arp, the ISO 639-3 code for the Arapaho language, a Native American language
• arp, the customary symbol for the arpent, an obsolete agrarian unit of distance and area measurement
• Arp, a rosemary cultivar
• Arp2/3 complex, a protein
• Arp, Tennessee
• Arp, Texas