Loop

Loop or LOOP may refer to:

Brands and enterprises

 * Loop (mobile), a Bulgarian virtual network operator and co-founder of Loop Live
 * Loop, clothing, a company founded by Carlos Vasquez in the 1990s and worn by Digable Planets
 * Loop Mobile, an Indian mobile phone operator
 * Loop, a reusable container program announced in 2019 by TerraCycle

Geography

 * Loop, Germany, a municipality in Schleswig-Holstein
 * Loop (Texarkana), a roadway loop around Texarkana, Arkansas, United States
 * Loop, Blair County, Pennsylvania, United States
 * Loop, Indiana County, Pennsylvania, United States
 * Loop, West Virginia, United States
 * Loop 101, a semi-beltway of the Phoenix Metropolitan Area
 * Loop 202, a semi-beltway of the Phoenix Metropolitan Area
 * Loop 303, a semi-beltway of the Phoenix Metropolitan Area
 * Chicago Loop, the downtown neighborhood of Chicago bounded by the elevated railway The Loop
 * Loop Retail Historic District, a shopping district in the Chicago Loop
 * Delmar Loop, an entertainment district in St. Louis, Missouri
 * London Outer Orbital Path (LOOP), a signed walk around the edge of Outer London, England
 * Louisiana Offshore Oil Port (LOOP), a deep-water port in the Gulf of Mexico off the coast of Louisiana

People

 * Call Me Loop (born 1991), English singer and songwriter
 * Liza Loop (active from 1975), American technology pioneer
 * Uno Loop (1930–2021), Estonian singer, musician, athlete, actor, and educator
 * Victoria Loop, brass and guitar player with English band Half Man Half Biscuit

Film

 * Loop (1991 film), a British romantic comedy
 * Loop (1999 film), a Venezuelan film
 * Loop (2020 film), an American animated short
 * Film loop, the slack portion of the film around the projector lens in a movie projector
 * Porn loop, an 8 or 16 mm video "short" of a pornographic nature that could be purchased from men's magazines starting in the 1950s

Groups

 * Loop (band), a London rock band

Other uses in music

 * Loop (album), a 2002 album by Keller Williams
 * Loop (music), a finite element of sound which is repeated by technical means
 * "Loop" (Maaya Sakamoto song), 2005
 * "Loop" (Sarah Bonnici song), the entry for Malta in the Eurovision Song Contest 2024
 * Loop, a 2020 mini-album by Peakboy

Other uses in arts, entertainment, and media

 * Loop (novel), a novel in the Ring series by Koji Suzuki
 * LOOP Barcelona, an annual meeting point for video art in Barcelona, Spain
 * Loop Mania, a mobile arcade video game

Computing and technology

 * Loop (computing), a method of control flow in computer science
 * LOOP (programming language), the pedagogical primitive recursive programming language with bounded loops
 * Loop (telecommunication), sending a signal on a channel and receiving it back at the sending terminal
 * Audio induction loop, an aid for the hard of hearing
 * Local loop, the physical link in telephony that links the customer premises to the telephone company (telco)
 * Loop device, a Unix device node that allows a file to be mounted as if it were a device
 * LOOPS, the object system for Interlisp-D

Mathematics

 * Loop (algebra), a quasigroup with an identity element
 * Loop (graph theory), an edge that begins and ends on the same vertex
 * Loop (topology), a path that starts and ends at the same point, possibly reduced to a single point

Sports

 * Loop, a type of playboating maneuver
 * Aerobatic loop, a type of aircraft aerobatic maneuver
 * Ground loop (aviation), a rapid horizontal (yawing) rotation of a fixed-wing aircraft used in emergencies to bleed of energy while landing
 * Loop (cricket), an aspect of bowling in cricket
 * Loop jump, a figure skating jump
 * Loop, a type of offensive shot in table tennis

Roller coasters

 * Loop (roller coaster), a basic roller coaster inversion
 * Pretzel loop, a roller coaster element

Transportation

 * Loop (Amtrak train), a discontinued Amtrak train
 * The Loop (CTA), a rapid transit section bounding Chicago's Loop neighborhood
 * Loop, underground public transportation system of The Boring Company in Tesla cars, including a proposed DC-to-Baltimore system
 * Balloon loop, a section of track that allows reversal of direction without stopping
 * Circle route, a public transport route that travels around and connecting the peripheral zones of an area.
 * Loop line (railway), a branch line that deviates from a direct route and rejoins it at another location
 * Loop route, a main route or highway that forms a closed loop
 * Passing loop, a short section of track that allows trains to pass on a single track route
 * Ring road or loop, a main route or highway that encircles a town or city
 * Spiral (railway), a section of track that allows a train to climb a steep hill

Other uses

 * Compulsion loop, a habitual chain of activities that will be repeated by the user to cause them to continue the activity
 * Loop (biochemistry), a flexible region in a protein's secondary structure
 * Loop (education), the process of advancing an elementary school teacher with his or her class
 * Loop (knot), one of the fundamental structures used to tie knots
 * Loop, a cul de sac
 * Loop, a type of fingerprint pattern