Main Page | See live article | Alphabetical index The term loop, in its general sense, refers to something that closes back on on itself. It has been used in the following particular applications: A loop is one of the fundamental structures used to tie knots. See Loop (knot). In mathematics a loop is a quasigroup with an identity element. See Loop (algebra). In computer science, a loop is a sequence of commands that is carried out several times but written just once. See Program loop. In telecommunication, a loop is an electrical circuit that connects a telephone handset to the telephone exchange. See Loop (telecommunication). In music, a loop is a finite element of sound which is repeated by technical means. See music loop. The Loop is an area in downtown Chicago. See Loop (Chicago). This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.