HP-45

Model: HP-45
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Adapter: 
Year: 1973
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Info: 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 (equivalent to $2,411 in 2021). Especially noteworthy was its pioneering addition of a shift key that gave other keys alternate functions.

 WIkepedia HP-45