HP-32S
programmable RPN Scientific Calculator
The HP-32S (codenamed "Leonardo") was a programmable reverse Polish notation scientific calculator introduced by Hewlett-Packard in 1987. It was succeeded by the HP-32SII scientific calculator.
HP-32SII
The HP 32sII was introduced in 1991 and was produced until 2002. It added a second shift key, which allowed quicker access to many functions that were previously buried in menus. The 32sII also added fraction support, accessed by pressing the decimal point key twice. The 32sII also updated the solver to algebraic entry, versus the original RPN entry on the 32s. The original color scheme (orange left-shift and blue right-shift keys) was similar to that of the HP 32s and HP 48SX, but in 1999 HP changed the color scheme to a dark green left-shift and lilac right-shift.
The quick availability of functions on the HP 32sII led it to become the calculator of choice for the Texas UIL calculator competitions.
This brief starts where responsible research should: with the source description of “HP-32S” as programmable RPN Scientific Calculator. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the science & nature register because the source frames it as programmable RPN Scientific Calculator. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Aug 22, 2026. The linked authority identifier is Q1565779. The Library of Congress control number is sh89001318. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1987, 1991, 2002 and 1999.
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This entry incorporates text from “HP-32S” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.