You can set a stored program to launch at power-up.

To load a pre-defined program:

With the power off, press STOP+BitN, where N = the button representing the pre-loaded program (eg. STOP+3 for the BCD real-time clock.)  While holding the buttons, turn the power on.  Release buttons after the power-on "animation".

To load a user-saved program:

With the power off, press READ+BitN, where N = the "page" of memory you would like loaded.  While holding the buttons, turn the power on.  Release buttons after the power-on "animation".

To prevent any program from loading (default condition):

With the power off, press STOP.  While holding the button, turn the power on.  Release button after the power-on "animation".

To return all settings to defaults:

With the power off, press STOP+CLEAR.  While holding the buttons, turn the power on.  Release buttons after the power-on "animation".