- noun the storage location only used for control data
- noun a register of a central processing unit that stores the instruction that is currently being executed.
- In a CPU, a register that contains the address of the location in memory that is to be accessed by the next instruction. May also refer to the address of the current instruction. Also called by various other names, including control counter, current-instruction register, program counter, program register, instruction register, instruction counter, and sequence register.
- synonym control counter
- synonym current-instruction register
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