Test-and-set is a single indivisible machine instruction known simply as TS and was introduced by IBM for its multiprocessing System 360/370 computers.

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Test-and-set is a single machine instruction introduced by IBM for its multiprocessing System 360/370 computers. It is known as TS and is designed to support synchronization between multiple processes or threads.

Test-And-Set Is a Single Indivisible Machine Instruction Known Simply as TS