Go up to Top.

Go forward to PPN.

 POP [based on the stack operation that removes the top of a stack,
       and the fact that procedure return addresses are saved on the stack]
       dialect: POPJ (pop-jay), based on the PDP-10 procedure return
       instruction. v. To return from a digression. By verb doubling,
       "Popj, popj" means roughly, "Now let's see, where were