textbook 04-cpu-intro, page 2:
...the program counter (PC) (sometimes called the instruction pointer or IP)
tells us which instruction of the program will execute next...

Remove IP: (done 9/5/2021)

OLD:

  Chapter 4 notes, 1. Processes:
    process = running program
    with associated address space, registers (PC, IP, SP, FP), and I/O