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 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 subgenr ...

* Loop Mobile, an Indian mobile phone operator * Loop, a reusable container program announced in 2019 by

TerraCycle TerraCycle is a private U.S.-based recycling business headquartered in Trenton, New Jersey. It primarily runs a volunteer-based recycling platform to collect non-recyclable pre-consumer and post-consumer waste on behalf of corporate donors ...

Geography

Loop, Germany Loop is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein Schleswig-Holstein (; da, Slesvig-Holsten; nds, Sleswig-Holsteen; frr, Slaswik-Holstiinj) is the northernmost of the 16 states of Germany, comprising ...

, a municipality in Schleswig-Holstein *

Loop (Texarkana) The Loop is a beltway around Texarkana, TX and Texarkana, AR, which are twin cities in the U.S. states of Arkansas and Texas. Consisting of a section of Interstate 49 (I-49) in Arkansas, and Loop 151 and a section of I-369 and U ...

, a roadway loop around Texarkana, Arkansas, United States *

Loop, Blair County, Pennsylvania Loop is an unincorporated community and census-designated place (CDP) in Blair County, Pennsylvania, United States. It was first listed as a CDP prior to the 2020 census. The CDP is in south-central Blair County, in the western part of Frankstow ...

, United States * Loop, Indiana County, Pennsylvania, United States *

Loop, West Virginia Loop is an unincorporated community in Jackson County, West Virginia West Virginia is a state in the Appalachian, Mid-Atlantic and Southeastern regions of the United States.The Census Bureau and the Association of American Geographers ...

, 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 Ch ...

, 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 Loop, one of Chicago's 77 designated community areas, is the central business district of the city and is the main section of Downtown Chicago. Home to Chicago's commercial core, it is the second largest commercial business district in Nort ...

, 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 area in Cook County, Illinois, United States. It is bounded by Lake Street to the north, Ida B. Wells Drive to the south, State Street to the west and Wa ...

, 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 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 M ...

(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, ''C ...

(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 i ...

(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 opto-mechanical device for displaying motion picture film by projecting it onto a screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras. Mod ...

* 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) In music, a loop is a repeating section of sound material. Short sections can be repeated to create ostinato patterns. Longer sections can also be repeated: for example, a player might loop what they play on an entire verse of a song in order to ...

, 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, an annual meeting point for video art in Barcelona, Spain * ''

Loop Mania ''Loop Mania'' is a mobile arcade video game developed by Umbrella and Games From Outer Space and published by Umbrella. It was released on 6 April 2016 for iOS and 27 May for Android. Gameplay ''Loop Mania'' is an endless arcade video game ...

'', 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 In telephony, the local loop (also referred to as the local tail, subscriber line, or in the aggregate as the last mile) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the commo ...

, 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 ...

, a Unix device node that allows a file to be mounted as if it were a device * LOOPS, the object system for

Interlisp Interlisp (also seen with a variety of capitalizations) is a programming environment built around a version of the programming language Lisp. Interlisp development began in 1966 at Bolt, Beranek and Newman (renamed BBN Technologies) in Cambridge, ...

-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 have ...

, 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 Aerobatics is the practice of flying maneuvers involving aircraft attitudes that are not used in conventional passenger-carrying flights. The term is a portmanteau of "aerial" and "acrobatics". Aerobatics are performed in aeroplanes and glide ...

, 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 The loop jump is an edge jump in the sport of figure skating. The skater executes it by taking off from the back outside edge of the skating foot, turning one rotation in the air, and landing on the back outside edge of the same foot. It is oft ...

, 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), 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 balloon loop, turning loop, or reversing loop ( North American Terminology) allows a rail vehicle or train to reverse direction without having to shunt or stop. Balloon loops can be useful for passenger trains and unit freight trains. Bal ...

, 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, 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 (usu ...

, 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 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