Arp or ARP may refer to:
The Advanced Research Projects Agency Network (ARPANET) was an early packet switching network and the first network to implement the protocol suite TCP/IP.
Arpeggio of Blue Steel (蒼き鋼のアルペジオ, Aoki Hagane no Arupejio) is a Japanese manga series produced by Ark Performance and serialized in Shōnen Gahosha's Young King Ours.
Arpajon ([aʁpaʒɔ̃]) is a French commune in the Essonne department in the Île-de-France region of northern France.
In computer networking, ARP spoofing, ARP cache poisoning, or ARP poison routing, is a technique by which an attacker sends (spoofed) Address Resolution Protocol (ARP) messages onto a local area network.
ARPA-E, or Advanced Research Projects Agency-Energy is a United States government agency tasked with promoting and funding research and development of advanced energy technologies.
Arpad Busson (born 27 January 1963) is a London-based French financier. Busson entered the world of hedge funds in 1986 working in New York.
ARP Instruments, Inc. was an American manufacturer of electronic musical instruments, founded by Alan Robert Pearlman in 1969. Best known for its line of synthesizers that emerged in the early 1970s, ARP closed its doors in 1981 due to financial difficulties.
A "broken chord" is a chord broken into a sequence of notes. A broken chord may repeat some of the notes from the chord and span one or more octaves.