Loop

Look up loop in Wiktionary, the free dictionary.

Loop or LOOP may refer to:

Computing

Loop (computing), a method of control flow in computer science
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
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

Balloon loop, a section of track that allows reversal of direction without stopping
Loop line (railway), a branch line that deviates from a direct route and rejoins it at another location
Passing loop, a short section of track that allows trains to pass on a single track route
Spiral (railway), a section of track that allows a train to climb a steep hill
Loop (Amtrak train), a discontinued Amtrak train
The Loop (CTA), a section of CTA track in Chicago

Loop, Germany, a municipality in Schleswig-Holstein, Germany
Loop, West Virginia
London Outer Orbital Path, a signed walk around the edge of Outer London, England
Chicago Loop, the downtown neighborhood of Chicago, Illinois bounded by the elevated railway The Loop (CTA)
- Loop Retail Historic District, a shopping district in the Chicago Loop
Louisiana Offshore Oil Port, a deep-water port in the Gulf of Mexico off the coast of Louisiana
Delmar Loop, an entertainment district in St. Louis, Missouri

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 (film), a 1999 romantic comedy
Loop (knot), one of the fundamental structures used to tie knots
Loop (novel), a novel in the Ring series by Koji Suzuki
Loop (roller coaster), a basic roller coaster inversion
Loop, a type of fingerprint pattern
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. The subsequent advent of home video in the late 1970s rendered them obsolete.