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 Digable Planets () is an American hip hop trio formed in 1987. The trio is composed of rappers Ishmael "Butterfly" Butler, Mariana "Ladybug Mecca" Vieira, and Craig "Doodlebug" Irving. The group is notable for their contributions to the subgenre ...

* 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, 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 The Louisiana Offshore Oil Port (LOOP) is a deepwater port in the Gulf of Mexico 29 kilometers (18 nautical miles) off the coast of Louisiana near the town of Port Fourchon. LOOP provides tanker offloading and temporary storage services for cr ...

(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 A movie projector is an optics, opto-mechanics, mechanical device for displaying Film, motion picture film by projecting it onto a movie screen, screen. Most of the optical and mechanical elements, except for the illumination and sound devices ...

* 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), 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) The generic roller coaster vertical loop, where a section of track causes the riders to complete a 360 degree turn, is the most basic of roller coaster inversions. At the top of the loop, riders are completely inverted. History The vertical l ...

, a basic roller coaster inversion * Pretzel loop, a roller coaster element

Transportation

* ''Loop'' (Amtrak train), a discontinued Amtrak train *

The Loop (CTA) The Loop (historically Union Loop) is the long circuit of elevated rail that forms the hub of the Chicago "L" system in the United States. As of 2012, the branch has served 74,651 passengers every weekday. The Loop is so named because the eleva ...

, a rapid transit section bounding Chicago's Loop neighborhood * Loop, underground public transportation system of

The Boring Company The Boring Company (TBC) is an American infrastructure and tunnel construction services company founded by Elon Musk. Its ongoing and proposed projects are designed for intra-city ("loop") transit systems. After six years TBC has completed one ...

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) Loop line has several meanings. * A less important line which leaves a main line and then rejoins it later, continuing in the same direction. Significantly longer than a passing loop, its purpose may be purely to provide a bypassing route, or it m ...

, 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 passing loop (UK usage) or passing siding (North America) (also called a crossing loop, crossing place, refuge loop or, colloquially, a hole) is a place on a single line railway or tramway, often located at or near a station, where trains or ...

, 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 spiral (sometimes called a spiral loop or just loop) is a technique employed by railways to ascend steep hills. A railway spiral rises on a steady curve until it has completed a loop, passing over itself as it gains height, allowing the railw ...

, 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 A dead end, also known as a cul-de-sac (, from French for 'bag-bottom'), no through road or no exit road, is a street with only one inlet or outlet. The term "dead end" is understood in all varieties of English, but the official terminology ...

* Loop, a type of

fingerprint A fingerprint is an impression left by the friction ridges of a human finger. The recovery of partial fingerprints from a crime scene is an important method of forensic science. Moisture and grease on a finger result in fingerprints on surfac ...

pattern