Loop or LOOP may refer to:
Brands and enterprises
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Loop (mobile), a Bulgarian virtual network operator and co-founder of Loop Live
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Loop, clothing, a company founded by Carlos Vasquez in the 1990s and worn by Digable Planets
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Loop Mobile, an Indian mobile phone operator
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Loop Internet, an internet service provider in Pennsylvania, United States
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Loop, a reusable container program announced in 2019 by TerraCycle
Geography
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Loop, Germany, a municipality in Schleswig-Holstein
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Loop (Texarkana), a roadway loop around Texarkana, Arkansas, United States
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Loop, Blair County, Pennsylvania, United States
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Loop, Indiana County, Pennsylvania, United States
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Loop, West Virginia, United States
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Loop 101, a semi-beltway of the Phoenix Metropolitan Area
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Loop 202, a semi-beltway of the Phoenix Metropolitan Area
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Loop 303, a semi-beltway of the Phoenix Metropolitan Area
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Chicago Loop, the downtown neighborhood of Chicago bounded by the elevated railway The Loop
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Loop Retail Historic District, a shopping district in the Chicago Loop
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Delmar Loop, an entertainment district in St. Louis, Missouri
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London Outer Orbital Path (LOOP), a signed walk around the edge of Outer London, England
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Louisiana Offshore Oil Port (LOOP), a deep-water port in the Gulf of Mexico off the coast of Louisiana
People
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Call Me Loop (born 1991), English singer and songwriter
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Liza Loop (active from 1975), American technology pioneer
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Uno Loop (1930–2021), Estonian singer, musician, athlete, actor, and educator
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Victoria Loop, brass and guitar player with English band Half Man Half Biscuit
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Steven Tyler Loop, American football player
Arts, entertainment, and media
Film
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Loop (1991 film), a British romantic comedy
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Loop (1999 film), a Venezuelan film
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Loop (2020 film), an American animated short
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Film loop, the slack portion of the film around the projector lens in a movie projector
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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
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Loop (band), a London rock band
Other uses in music
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Loop (album), a 2002 album by Keller Williams
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Loop (music), a finite element of sound which is repeated by technical means
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"Loop" (Maaya Sakamoto song), 2005
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"Loop" (Sarah Bonnici song), the entry for Malta in the Eurovision Song Contest 2024
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Loop, a 2020 mini-album by Peakboy
Other uses in arts, entertainment, and media
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Loop (novel), a novel in the Ring series by Koji Suzuki
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LOOP Barcelona, an annual meeting point for video art in Barcelona, Spain
Computing and technology
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Loop (computing), a method of control flow in computer science
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LOOP (programming language), the pedagogical primitive recursive programming language with bounded loops
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Loop (telecommunication), sending a signal on a channel and receiving it back at the sending terminal
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Audio induction loop, an aid for the hard of hearing
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Local loop, the physical link in telephony that links the customer premises to the telephone company (telco)
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Loop device, a Unix device node that allows a file to be mounted as if it were a device
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LOOPS, the object system for Interlisp-D
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continue statement (in some languages skip, cycle, next, loop, or iterate), a structured control statement that skips ahead to the next iteration of the loop containing it
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Microsoft Loop, collaborative software
Mathematics
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Loop (algebra), a quasigroup with an identity element
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Loop (graph theory), an edge that begins and ends on the same vertex
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Loop (topology), a path that starts and ends at the same point, possibly reduced to a single point
Sports
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Aerobatic loop, a type of aerobatic maneuver
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Ground loop (aviation), a rapid horizontal (yawing) rotation of a fixed-wing aircraft used in emergencies to bleed of energy while landing
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Loop, a type of canoe freestyle maneuver
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Loop (cricket), an aspect of bowling in cricket
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Loop jump, a figure skating jump
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Loop, a type of offensive shot in table tennis
Roller coasters
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Loop (roller coaster), a basic roller coaster inversion
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Pretzel loop, a roller coaster element
Transportation
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Loop (Amtrak train), a discontinued Amtrak train
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The Loop (CTA), a rapid transit section bounding Chicago's Loop neighborhood
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Loop, underground public transportation system of The Boring Company in Tesla cars, including a proposed DC-to-Baltimore system
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Balloon loop, a section of track that allows reversal of direction without stopping
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Circle route, a public transport route that travels around and connecting the peripheral zones of an area.
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Loop line (railway), a branch line that deviates from a direct route and rejoins it at another location
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Loop route, a main route or highway that forms a closed loop
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Passing loop, a short section of track that allows trains to pass on a single track route
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Ring road or loop, a main route or highway that encircles a town or city
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Spiral (railway), a section of track that allows a train to climb a steep hill
Other uses
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Compulsion loop, a habitual chain of activities that will be repeated by the user to cause them to continue the activity
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Loop (biochemistry), a flexible region in a protein's secondary structure
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Loop (education), the process of advancing an elementary school teacher with his or her class
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Loop (knot), one of the fundamental structures used to tie knots
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Loop, the end of some
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Loop, a type of fingerprint pattern
See also
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The Loop (disambiguation)
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Circle
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Cycle (disambiguation)
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Cycle graph
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Electronic circuit
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Hoop (disambiguation)
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Inner loop (disambiguation)
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Line echo wave pattern (LEWP)
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Loophole
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Looping (disambiguation)
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Loopy (disambiguation)
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Loupe, a small magnifying glass used by jewelers, watchmakers, and other precision craftsmen
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Möbius strip
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Ring (disambiguation)