HP -67 Owner's Handbook Manual page 22

18
Meet the HP-67
. The calculator display should read to prompt
you that side 2 of the card must be read in.
. Now insert side 2 of the calendar functions card, again face up,
into the card reader slot on the right side of the calculator and
permit it to pass through the card reader to the rear of the
calculator.
. If after either pass of the card through the card reader, the
display shows Error , that side of the card did not read
properly. Press ,then insert that side of the card into the
card reader slot and let it pass through again.
. When both sides of the card have been read properly, the display
will again show the previous answer.
. Insert the card into the window slot, as shown. The markings
on the card should be directly over the keys marked (£
g . The markings, or mnemonics, on the card now
identify the function of each of these five keys.
You are now ready to use the program.
Example: How many days are there between September 3, 1944 and
November 21, 1975?
Solution: The figure on the next page duplicates the userinstructions
for the Calendar Functions program. These instructions can also be
found in the HP-67 Standard Pac, just as can the instructions for the
other 14 programs in the pac.