R/S RUN STOP.   If R/S is keyed in and a stored program is not executing, the stored program starts executing at the step denoted by the program pointer.   If executed in a stored program, R/S stops the program displaying the X-register and allowing keystrokes from the operator.   If a R/S in a program is immediately preceded by a numerical entry from the program, the automatic lift is disabled upon return to the keyboard. This allows a program to display prompting information that will not be lifted in the stack if you enter a number from the keyboard. Except for this case, R/S does not affect the stack lift.   In a program, R/S must have an ENTER  separating the R/S from succeeding digit keys. GTO Go to (prefix). When followed by a digit (0, . . . , 9) or a letter (A, . . . , E), GTO advances the program pointer to the first occurrence of the corresponding program label (i.e., LBL followed by the same digit or letter).