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From Wikipedia
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. Introduced on May 1 1973, this was the third handheld electronic calculator sold by HP, and the second scientific model. It built on the success of the HP-35, adding many new features. Some were taken from the HP-80, others were completely new, including the LAST X command, numbered data registers, store and recall register arithmetic, built-in conversion constants, and selection of trigonometric modes (DEG, RAD, GRAD).It is the first handheld known to have had a code name - "Wizard". Early models had a built-in timer. |
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[Vintage Computers][HP45 Calculator]
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