Program-counter meaning

A register in the control unit of the CPU that is used to keep track of the address of the current or next instruction. Typically, the program counter is advanced to the next instruction, and then the current instruction is executed. Also known as a "sequence control register" and the "instruction pointer." See address register and instruction register.
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(computing) A register that stores the address of the current (next) instruction to be carried out by the processor.
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