Don't laught to me but can someone tell me how to turn my calculator off??? I receive it today and i suspect that the "on" is the atn key but i cannot find the off key... For now, i just wait for the calculator to tur itsel off due to inactivity...
Another question, what is the purpose of the third battery contact in the batt compartment? the 2 others ar for the hp-35 pack but the third...
Where can i find online documentation about the HP-75C?
Thanks!
P.S. I collect calculators since 3 years and it's my first HP... all my other one are TI; perhaps that's why my questions looks a bit ...humm... easy for you!
Michel