HP-15C

The HP-15C calculator was produced by Hewlett-Packard from 1982 until it was discontinued in 1989. It had an original MSRP of $134.99. The 15C was part of HP’s Voyager line of calculators that began in 1981. The Voyager line, including the 15C, are all programmable calculators and use Reverse Polish …

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HP 35

This HP 35 was the first scientific pocket calculator and was introduced in 1972.  It stayed in production until 1975 and retailed at a price of $395.00. The 35 was allegedly a hack by an HP engineer of the HP 9100 which was a large desktop calculator with a price …

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HP 65

This fairly hard to find Hewlett Packard made HP 65 calculator was produced from 1974 up until 1977 and retailed for $795.00.  It was HP’s first programmable pocket calculator and had a built in magnetic card reader – writer.  It featured a single line red LED display and used RPN …

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HP 70

This HP 70 is a fairly difficult calculator to find in good working condition. It is a business calculator that Hewlett Packard offered as a lower end choice to the HP 80.  As you can see it has a unique color scheme with the orange keys and green/gray case.  It …

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HP 11C

This is the HP 11C which was introduced to the calculator buying consumer in 1981 and was discontinued in 1989.  The 11C is a scientific programmable calculator and had a retail price of $135.00 though by 1989 its price had dropped to $56.00.  It featured a landscape liquid crystal display …

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HP 41CX

This is the Hewlett-Packard 41cx or HP-41cx calculator.It is part of the HP 41 family which was introduced in 1979. There was the 41C, 41CV and the 41CX. The 41CX was introduced in 1983 and finally discontinued in 1990.  It had numerous features including: Up to 6.4K RAM Up to …

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HP 37E

Introduced in 1978 and discontinued in 1983 the HP 37E was one of HP’s lower end business calculators. It replaced their HP 22 and retailed for around $75.00. It was not programmable but did have quite a few pre-programmed functions available. And, it had Factorial and 1/x functions. It utilized …

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