Loop or LOOP may refer to:

Brands and enterprises

* Loop (mobile), a Bulgarian virtual network operator and co-founder of

Loop Live The Loop Live festival is a music festival in Bulgaria. Since 2007 it is held once a year on Prince Alexander of Battenberg Square in the capital city Sofia. It's a free music event and always includes a host of new and popular artists. The fe ...

* 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 Loop is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe ...

, 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 Loop was an unincorporated community in West Mahoning Township, Indiana County, Pennsylvania. The community was named for its location near a loop in the meandering Mahoning Creek. Lysander Barrett settled in the area around 1842; an iron furnace ...

, United States * Loop, West Virginia, United States *

Loop 101 Arizona State Route 101 (SR 101) or Loop 101 is a semi-beltway looping around the Phoenix Metropolitan Area in central Arizona. It connects several suburbs of Phoenix, including Tolleson, Glendale, Peoria, Scottsdale, Mesa, Tempe, and Cha ...

, a semi-beltway of the Phoenix Metropolitan Area * Loop 202, a semi-beltway of the Phoenix Metropolitan Area *

Loop 303 Arizona State Route 303 (SR 303) or Loop 303, also known as the Bob Stump Memorial Parkway (formerly the Estrella Freeway), is a freeway that serves the west part of the Phoenix metropolitan area. The freeway, originally a two-lane ...

, 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 Loop Retail Historic District is a shopping district within the Chicago Loop Community areas of Chicago, community area in Cook County, Illinois, United States. It is bounded by Lake Street (Chicago), Lake Street to the north, Ida B. Wells Driv ...

, a shopping district in the Chicago Loop *

Delmar Loop The Delmar Loop, often referred to by St. Louis residents simply as The Loop, is an entertainment, cultural and restaurant district in University City, Missouri and the adjoining western edge of St. Louis near Washington University in St. Louis an ...

, an entertainment district in St. Louis, Missouri *

London Outer Orbital Path The London Outer Orbital Path — more usually the "London LOOP" — is a 150-mile (242 km) signed walk along public footpaths, and through parks, woods and fields around the edge of Outer London, England, described as "the M2 ...

(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 Georgia Buchanan (born 23 December 1990), known professionally as Call Me Loop, is an English singer and songwriter. Following the release of her debut single "Looking at You" in 2016, she has since independently released two extended plays, '' ...

(born 1991), English singer and songwriter * Liza Loop, American technology pioneer *

Uno Loop Uno Loop (31 May 1930 – 8 September 2021) was an Estonian singer, musician, athlete, actor, and educator. Loop's career as a musician and singer began in the early 1950s. He performed with various ensembles and as a popular soloist beginning in ...

(1930–2021), Estonian singer, musician, athlete, actor, and educator

Arts, entertainment, and media

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

Music

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" (song), a song by Maaya Sakamoto * ''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 LOOP is an annual meeting point in Barcelona for video art. The platform takes the form of a festival, a fair and conferences. Over a two-week period, the LOOP Festival presents works of 800 artists to nearly 200,000 visitors in 100 locations, ...

, 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) LOOP is a simple register language that precisely captures the primitive recursive functions. The language is derived from the counter-machine model. Like the counter machines the LOOP language comprises a set of one or more unbounded ''registers ...

, the pedagogical primitive recursive programming language with bounded loops *

Loop (telecommunication) Loopback (also written loop-back) is the routing of electronic signals or digital data streams back to their source without intentional processing or modification. It is primarily a means of testing the communications infrastructure. There are m ...

, 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 In Unix-like operating systems, a loop device, vnd (vnode disk), or lofi (loop file interface) is a pseudo-device that makes a computer file accessible as a block device. Before use, a loop device must be connected to an extant file in the file sys ...

, 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) In mathematics, especially in abstract algebra, a quasigroup is an algebraic structure resembling a group in the sense that "division" is always possible. Quasigroups differ from groups mainly in that they need not be associative and need not ha ...

, a quasigroup with an identity element * Loop (graph theory), an edge that begins and ends on the same vertex *

Loop (topology) In mathematics, a loop in a topological space is a continuous function from the unit interval to such that In other words, it is a path whose initial point is equal to its terminal point.. A loop may also be seen as a continuous map from t ...

, 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 *

Loop (cricket) In cricket, the flight of the ball is its trajectory through the air between being released by the bowler and bouncing on the pitch. The flight of a delivery may be varied by changing the pace of the ball or through use of the Magnus force. Fligh ...

, 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 circle route (also circumference, loop, ring route, ring line or orbital line) is a public transport route following a path approximating a circle or at least a closed curve. The expression "circle route" may refer in particular to: * a rout ...

, 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 In road transportation in the United States, a special route is a road in a numbered highway system that diverts a specific segment of related traffic away from another road. They are featured in many highway systems; most are found in the Int ...

, 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 A ring road (also known as circular road, beltline, beltway, circumferential (high)way, loop, bypass or orbital) is a road or a series of connected roads encircling a town, city, or country. The most common purpose of a ring road is to assist i ...

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

Loop (biochemistry) A turn is an element of secondary structure in proteins where the polypeptide chain reverses its overall direction. Definition According to one definition, a turn is a structural motif where the Cα atoms of two residues separated by a few (us ...

, 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