This glorious specimen is an open hardware RPN calculator with more than a nod to the venerable Hewlett Packard HP42 in its ... you could wish for in a scientific calculator.

They haven’t been produced in decades, but [Chris Chung] has used some open source code to create DIY hardware version of the HP-41 Reverse Polish Notation (RPN) calculator. The open source code ...

Chips in early Busicom calculators were made in the United States by Mostek, while those in the Bowmar and Canon were by Texas Instruments. Hewlett-Packard Corporation joined the market in early 1972 ...

The calculator’s “C” button—the one that clears input—was gone. The “C” itself had been cleared. The “C” button’s function is vestigial. Back when calculators were commercialized, starting in the ...

See how your savings and investment account balances can grow with the magic of compound interest. Many, or all, of the products featured on this page are from our advertising partners who ...

Hewlett-Packard Company (HP) is a provider of products, technologies, software, solutions and services to individual consumers, small- and medium-sized businesses (SMBs) and large enterprises ...

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The grieving family of tech tycoon Mike Lynch face a new ordeal after US giant Hewlett-Packard refused to rule out pursuing them over a legal case. In 2022, the firm won a multi-billion-pound High ...

We cover the spread of Marburg virus, a stem cell treatment for diabetes and the way dolphins smile in this week’s news roundup.