The PC’s PC
After the instruction has been fetched from memory, the PC is incremented to refer to the next instruction in sequence
This scheme should cause the computer to “run” through memory executing all instructions once and “fall off the end of memory”
Computers have machine instructions to branch and jump, i.e. go to some instruction other than the next
Jump and Branch change the PC after increment
Programs generally repeat many instructions
3 PCs: personal computer, program counter and printed circuit board