A loop is generally something that closes back on itself such as a circle or ring. Science and technology · Loop , a quasigroup with an identity element · Loop , an edge that begins and ends on the same vertex · Loop (topology), a path that starts and ends at the same point · Program loop (computers), a sequence of commands that is executed repeatedly · An infinite loop is a sequence of instructions in a computer program which loops endlessly. · Wilson loop (physics), a closed path integral of the gauge field · Loop (electricity), a closed circuit · Loop , one of the fundamental structures used to tie knots · Loop , sending a signal on a channel and receiving it back at the sending terminal · Local loop (telecommunication), the link connecting the customer to the carrier · Loop antenna, a radio antenna composed of one or more turns of conductor · Loop device (Uni

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