HP-45


The HP-45 is the second scientific pocket calculator introduced by Hewlett-Packard, adding to the features of the HP-35. It was introduced in 1973 with an MSRP of US$395. Especially noteworthy was its pioneering addition of a shift key that gave 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.


The display of the HP-45 hidden timer showing 00 hours 00 minutes 07 seconds and 58/100 second.

Emulators

Several individuals and companies make software emulators of the HP 45 series calculators.
; : Emulates, among other, the HP-45. Licensed under the GNU General Public License. Available for Microsoft Windows.
; : HP-45 Emulator written in Java. Licensed under the GPL 3. Available for Android and Symbian.
; : An Emulator for Windows Phone 7.
; : The HP-45 Program ROM was translated to JavaScript to have an exact simulation of the original calculator for use in web browsers.