Neha Patil (Editor)

HP 45

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Type
  
scientific

Discontinued
  
1976

Display type
  
Seven-segment display

Introduced
  
1973

Entry mode
  
RPN

Display size
  
10 + 2

HP-45

The HP-45 was the second scientific calculator introduced by Hewlett-Packard, adding to the features of the HP-35. Especially noteworthy was its pioneering addition of a shift key that gave the other keys alternate functions.

The calculator was code-named Wizard, which is the first known use of a code name for a calculator. It also contained an Easter egg that allowed users to access a not-especially accurate stopwatch mode. An accurate version of the stopwatch mode was officially featured in the 1975 successor of the HP-45, the HP-55.

Emulators

Several individuals and companies make software emulators of the HP 45 series calculators.

Nonpareil, high-fidelity simulator for calculators
Emulates, among other, the HP-45. Licensed under the GNU General Public License (GPL). Available for a large variety of operating systems.
HP-45 Emulator
HP-45 Emulator written in Java. Licensed under the GPL 3. Available for Android and Symbian.
HP-45 Windows Phone 7 App 
An Emulator for Windows Phone 7.
HP-45 Emulator in JavaScript
The HP-45 Program ROM was translated to JavaScript to have an exact simulation of the original calculator for use in web browsers.

References

HP-45 Wikipedia
(Text) CC BY-SA