At your fingertips you have a tool that was unavailable to Archimedes,
Galileo, or Einstein. The only limits to the flexibility of the HP-25
are the limits of your own mind.
-- Hewlett-Packard 25 Handbook (1975).
The Museum of HP Calculators provides information on virtually
anything you did not know that you wanted to know about your Real Friend
in Life. http://www.hpmuseum.org/