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2. HP-65 - Wikipedia

   en.wikipedia.org/wiki/HP-65

   The HP-65 is the first magnetic card-programmable handheld calculator. Introduced by Hewlett-Packard in 1974 at an MSRP of $795 [1] (equivalent to $4,912 in 2023) [2], it featured nine storage registers and room for 100 keystroke instructions. It also included a magnetic card reader/writer to save and load programs.

3. Comparison of HP graphing calculators - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_HP_graphing...

   A graphing calculator is a class of hand-held calculator that is capable of plotting graphs and solving complex functions. While there are several companies that manufacture models of graphing calculators, Hewlett-Packard is a major manufacturer. The following table compares general and technical information for Hewlett-Packard graphing ...

4. HP calculators - Wikipedia

   en.wikipedia.org/wiki/HP_calculators

   HP calculators are various calculators manufactured by the Hewlett-Packard company over the years. Their desktop models included the HP 9800 series, while their handheld models started with the HP-35. Their focus has been on high-end scientific, engineering and complex financial uses.

5. HP-71B - Wikipedia

   en.wikipedia.org/wiki/HP-71B

   Using an HP 82402 Dual HP-IL controller, it was even possible to connect one 71B to two HP-IL loops simultaneously, possibly as a controller in one and as a device in another. The HP-71B could optionally be made compatible with the large volume of programs written for the HP-41 series of calculators via a plug-in ROM that emulated the HP-41 at ...

6. HP-55 - Wikipedia

   en.wikipedia.org/wiki/HP-55

   Like all Hewlett-Packard calculators of the era and most since, the HP-55 used Reverse Polish Notation (RPN) and a four-level automatic operand stack. Another feature of the HP-55 was that it officially featured a stop-watch function much similar to the hidden stop-watch function of the earlier HP-45 calculator. This stop-watch function could ...

7. Category:HP calculators - Wikipedia

   en.wikipedia.org/wiki/Category:HP_calculators

   This category has the following 2 subcategories, out of 2 total. H. ... Pages in category "HP calculators" The following 133 pages are in this category, out of 133 ...