Loop

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).

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