The tool is the HP-80 electronic answer-machine that weighs only nine ounces (you can take it anywhere you go—and should), and replaces stacks of tricky tables and other such …

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The Hewlett-Packard Series 80 of small scientific desktop computers was introduced in 1980, beginning with the popular HP-85 targeted at engineering and control applications. They …

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The HP-80 does not have a single CPU but contains five MOS/LSI (metal-oxide-semiconductor, large-scale-integration) circuits made up of seven read-only-memories (ROMs), an arithmetic …

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While the HP-35 was the first scientific pocket calculator, the HP-80, introduced a year later was the first financial calculator of any size (that I know of) and probably the first calculator to have …

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Free download of a color scan of the English-language book 'HP-80 Owner's Handbook' by Hewlett-Packard, which is an owner's manual (user's guide, operating manual, owner …