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The mystery of the rogue HP calculator: 12C or not 12C? That is the question
The HP-12C line is one of only two calculator models permitted to be used in Chartered Financial Analyst (CFA) exams ...
Hackaday3mon
A Brief History Of Calculator Watches
The Time Computer Calculator company produced ... HP created the HP-01 in 1977. These also came in gold and stainless models. Prices ranged from $450 to $850. You needed a special kit to do ...
Hackaday2y
Remoticon 2021 // Rob Weinstein Builds An HP-35 From The Patent Up
Fifty years ago, Hewlett-Packard introduced the first handheld scientific calculator, the HP-35. It was quite the ... to build a working model. TInyFPGA models were used, one for each custom ...