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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. HP calculators - Wikipedia

   en.wikipedia.org/wiki/HP_calculators

   It was a "do all" calculator that included algebraic solver like the HP-18C, statistical, probability and time/value of money calculations. It had approximately 7 kilobytes of programmable memory which could be used for formulas or notes. The two-push 6-key letter typing system was fairly fast after a learning period. [5] HP-28C: 1987

4. 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 ...

5. 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 ...

6. Hewlett-Packard Voyager series - Wikipedia

   en.wikipedia.org/wiki/Hewlett-Packard_Voyager_series

   The Hewlett-Packard Voyager series of calculators were introduced by Hewlett-Packard in 1981. [4] All members of this series are programmable, use Reverse Polish Notation, and feature continuous memory. Nearly identical in appearance, each model provided different capabilities and was aimed at different user markets.

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 ...