HP HP-25 User Manual

For example, to recall Avogadro’s number:
Press Display
2
Recalling a number causes the stack to lift unless the preceding
keystroke was =3 or (more about later).
When you recall a number, it is copied from the storage register
into the display, and it also remains in the storage register. You
can recall a number from a storage register any number of times
without altering it—the number will remain in the storage
register as a 10-digit number with a two-digit exponent of 10
until you overwrite it by storing another number there, or until
you clear the storage registers.
Example: Three tanks have capacities in U.S. units of 2.0,
14.4, and 55.0 gallons, respectively. If one U.S. gallon is
approximately equal to 3.785 liters, what is the capacity of each
of the tanks?
Method: Place the conversion constant in one of the storage
registers and bring it out as required.
Press Display
B 3 0.000 Display mode set.
3.785 B8 0 [3785 Constant placed in register R,.
2 @ Capacity of Ist tank in liters.
14.4 E80(x] Capacity of 2nd tank in liters.
55 80 Capacity of 3rd tank in liters.
B 2 Display mode reset.
Clearing Storage Registers
To clear the number from a single storage register, simply store
the quantity zero in the register by pressing[o] g followed by
the number key ([o]through[7]) of the register address.
To clear data from a// manual storage registers at once, without
affecting data in other portions of the calculator, press[ | [F=C].
This places zero in all eight of the storage registers. Of course,
turning the calculator OFF also clears all registers.

HP HP-25 Specifications

General

Brand	HP
Model	HP-25
Category	Calculator
Language	English