|Display Type||Seven-segment display|
|Display Size||10 + 2|
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 this stop-watch mode was in 1975 officially featured in the successor of the HP-45; the HP-55.
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 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.