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title="HP-33E/C">HP-33E/C</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><caption class="infobox-title">HP-30 series</caption><tbody><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:HP_33C_calculator-2.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/HP_33C_calculator-2.jpg/220px-HP_33C_calculator-2.jpg" decoding="async" width="220" height="390" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/HP_33C_calculator-2.jpg/330px-HP_33C_calculator-2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ca/HP_33C_calculator-2.jpg/440px-HP_33C_calculator-2.jpg 2x" data-file-width="1096" data-file-height="1941" /></a></span><div class="infobox-caption">The HP-33C</div></td></tr><tr><th scope="row" class="infobox-label">Type</th><td class="infobox-data"><a href="/wiki/Programmable_calculator" title="Programmable calculator">Programmable</a> <a href="/wiki/Scientific_calculator" title="Scientific calculator">scientific</a></td></tr><tr><th scope="row" class="infobox-label">Manufacturer</th><td class="infobox-data"><a href="/wiki/Hewlett-Packard" title="Hewlett-Packard">Hewlett-Packard</a></td></tr><tr><th scope="row" class="infobox-label">Introduced</th><td class="infobox-data">1978</td></tr><tr><th scope="row" class="infobox-label">Discontinued</th><td class="infobox-data">1983</td></tr><tr><th colspan="2" class="infobox-header">Calculator</th></tr><tr><th scope="row" class="infobox-label">Entry mode</th><td class="infobox-data"><a href="/wiki/RPN_input_method" class="mw-redirect" title="RPN input method">RPN</a></td></tr><tr><th scope="row" class="infobox-label">Precision</th><td class="infobox-data">10 display digits exponent ±99</td></tr><tr><th scope="row" class="infobox-label">Display type</th><td class="infobox-data"><a href="/wiki/Light-emitting_diode_display" class="mw-redirect" title="Light-emitting diode display">LED</a></td></tr><tr><th scope="row" class="infobox-label">Display size</th><td class="infobox-data">1 line</td></tr><tr><th colspan="2" class="infobox-header">CPU</th></tr><tr><th scope="row" class="infobox-label">Processor</th><td class="infobox-data"><a href="/wiki/HP_Saturn" title="HP Saturn">Saturn</a><sup id="cite_ref-HP-CPU_1-0" class="reference"><a href="#cite_note-HP-CPU-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> (<a href="/wiki/HP_Lewis" class="mw-redirect" title="HP Lewis">Lewis</a>)</td></tr><tr><th colspan="2" class="infobox-header">Programming</th></tr><tr><th scope="row" class="infobox-label">Programming language(s)</th><td class="infobox-data"><a href="/wiki/Reverse_Polish_Notation" class="mw-redirect" title="Reverse Polish Notation">RPN</a> key stroke <small>(fully merged)</small></td></tr><tr><th scope="row" class="infobox-label">Firmware memory</th><td class="infobox-data">? <a href="/wiki/Kilobyte" title="Kilobyte">KB</a> of <a href="/wiki/Read-only_memory" title="Read-only memory">ROM</a></td></tr><tr><th colspan="2" class="infobox-header">Interfaces</th></tr><tr><th scope="row" class="infobox-label">Ports</th><td class="infobox-data">no</td></tr><tr><th colspan="2" class="infobox-header">Other</th></tr><tr><th scope="row" class="infobox-label">Power supply</th><td class="infobox-data">2×1.5V AA cell batteries or power supply</td></tr><tr><th scope="row" class="infobox-label">Weight</th><td class="infobox-data">6 oz (170 g) to 8 oz (230 g)</td></tr><tr><th scope="row" class="infobox-label">Dimensions</th><td class="infobox-data">141×75×29mm</td></tr></tbody></table> <p>The <b>HP-30 or Spice series</b> are <a href="/wiki/Reverse_Polish_Notation" class="mw-redirect" title="Reverse Polish Notation">RPN</a> Scientific hand-held calculators introduced by <a href="/wiki/Hewlett-Packard" title="Hewlett-Packard">Hewlett-Packard</a> in 1978. Some models are programmable. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:HP_32E_calculator_-_pi_in_display.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/HP_32E_calculator_-_pi_in_display.jpg/220px-HP_32E_calculator_-_pi_in_display.jpg" decoding="async" width="220" height="330" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e8/HP_32E_calculator_-_pi_in_display.jpg/330px-HP_32E_calculator_-_pi_in_display.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e8/HP_32E_calculator_-_pi_in_display.jpg/440px-HP_32E_calculator_-_pi_in_display.jpg 2x" data-file-width="1791" data-file-height="2686" /></a><figcaption>The HP-32E</figcaption></figure> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HP_30_series&action=edit&section=1" title="Edit section: Overview"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Perhaps the HP-30 series, Spice, was to be released as a replacement for the aging HP-20 series.<sup id="cite_ref-HP30tech_2-0" class="reference"><a href="#cite_note-HP30tech-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-HP-museum-38C_3-0" class="reference"><a href="#cite_note-HP-museum-38C-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> It has no expandability. The display provided better readability by increasing the digit size and adding commas. </p><p>The entry-level was the HP-31E and 32E, that were not programmable; but even the 31E provided a Self-check.<sup id="cite_ref-HP-museum-31E_4-0" class="reference"><a href="#cite_note-HP-museum-31E-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>The HP-37E and 38E/C were the financial models of the Spice series. </p><p>The battery of these calculators can be changed without using tools. The housing is closed by screws.<sup id="cite_ref-thimet_HP-Models_5-0" class="reference"><a href="#cite_note-thimet_HP-Models-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Programming">Programming</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HP_30_series&action=edit&section=2" title="Edit section: Programming"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The HP-33E/C (49 steps plus subroutines)<sup id="cite_ref-HP-museum-33E_6-0" class="reference"><a href="#cite_note-HP-museum-33E-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> and HP-34C (70 steps)<sup id="cite_ref-thimet_HP34C_7-0" class="reference"><a href="#cite_note-thimet_HP34C-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> and 38E/C (99 steps)<sup id="cite_ref-HP-museum-38C_3-1" class="reference"><a href="#cite_note-HP-museum-38C-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> are programmable, the C-models have a permanent memory. </p><p>The production of the 31E ended in 1980,<sup id="cite_ref-thimet_HP31E_8-0" class="reference"><a href="#cite_note-thimet_HP31E-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> production of the other Spice models ended in 1983.<sup id="cite_ref-thimet_HP34C_7-1" class="reference"><a href="#cite_note-thimet_HP34C-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> As this calculator is regarded amongst the very good in terms of quality, key stroke feel and daily usability for engineers. </p> <div class="mw-heading mw-heading2"><h2 id="Simulators_and_emulators">Simulators and emulators</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HP_30_series&action=edit&section=3" title="Edit section: Simulators and emulators"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://github.com/mike632t/x11-calc">HP Calculator emulators</a> for Linux</li></ul> <div class="mw-heading mw-heading2"><h2 id="Features">Features</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HP_30_series&action=edit&section=4" title="Edit section: Features"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>All basic scientific <a href="/wiki/Function_(mathematics)" title="Function (mathematics)">functions</a></li> <li><a href="/wiki/Statistics" title="Statistics">Statistics</a> (HP-32E,<sup id="cite_ref-HP-museum-32E_9-0" class="reference"><a href="#cite_note-HP-museum-32E-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> HP-37E,<sup id="cite_ref-HP-museum-37E_10-0" class="reference"><a href="#cite_note-HP-museum-37E-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> HP-38E/C<sup id="cite_ref-HP-museum-38C_3-2" class="reference"><a href="#cite_note-HP-museum-38C-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>)</li> <li>Numerical integration (HP-34C)</li> <li>Programmability (keystroke programming with <a href="/wiki/Branch_(computer_science)" title="Branch (computer science)">branching</a>, <a href="/wiki/Control_flow#Loops" title="Control flow">loops</a>, tests and flags)</li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HP_30_series&action=edit&section=5" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/HP-34C" title="HP-34C">HP-34C</a></li> <li><a href="/wiki/HP_calculators" title="HP calculators">HP calculators</a></li> <li><a href="/wiki/List_of_Hewlett-Packard_products#Pocket_calculators" title="List of Hewlett-Packard products">List of Hewlett-Packard pocket calculators</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HP_30_series&action=edit&section=6" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-HP-CPU-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-HP-CPU_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/techcpu.htm">"HP CPU and Programming"</a>. <i>Museum of HP Calculators</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Museum+of+HP+Calculators&rft.atitle=HP+CPU+and+Programming&rft_id=https%3A%2F%2Fwww.hpmuseum.org%2Ftechcpu.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-HP30tech-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-HP30tech_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/tech30.htm">"30 Series Technology and Packaging"</a>. <i>www.hpmuseum.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.hpmuseum.org&rft.atitle=30+Series+Technology+and+Packaging&rft_id=https%3A%2F%2Fwww.hpmuseum.org%2Ftech30.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-HP-museum-38C-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-HP-museum-38C_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-HP-museum-38C_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-HP-museum-38C_3-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/features/38cf.htm">"HP-38C Features"</a>. <i>Museum of HP Calculators</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Museum+of+HP+Calculators&rft.atitle=HP-38C+Features&rft_id=https%3A%2F%2Fwww.hpmuseum.org%2Ffeatures%2F38cf.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-HP-museum-31E-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-HP-museum-31E_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/hp31.htm">"HP-31E"</a>. <i>Museum of HP Calculators</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Museum+of+HP+Calculators&rft.atitle=HP-31E&rft_id=https%3A%2F%2Fwww.hpmuseum.org%2Fhp31.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-thimet_HP-Models-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-thimet_HP-Models_5-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.thimet.de/CalcCollection/HP-Series/HP-Models.html#Spice">"HP-Models"</a>. <i>thimet.de</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=thimet.de&rft.atitle=HP-Models&rft_id=https%3A%2F%2Fwww.thimet.de%2FCalcCollection%2FHP-Series%2FHP-Models.html%23Spice&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-HP-museum-33E-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-HP-museum-33E_6-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/hp33.htm">"HP-33E/C"</a>. <i>Museum of HP Calculators</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Museum+of+HP+Calculators&rft.atitle=HP-33E%2FC&rft_id=https%3A%2F%2Fwww.hpmuseum.org%2Fhp33.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-thimet_HP34C-7"><span class="mw-cite-backlink">^ <a href="#cite_ref-thimet_HP34C_7-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-thimet_HP34C_7-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.thimet.de/CalcCollection/Calculators/HP-34C/Contents.htm">"HP-34C"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=HP-34C&rft_id=https%3A%2F%2Fwww.thimet.de%2FCalcCollection%2FCalculators%2FHP-34C%2FContents.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-thimet_HP31E-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-thimet_HP31E_8-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.thimet.de/CalcCollection/Calculators/HP-31E/Contents.htm">"HP-31E"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=HP-31E&rft_id=https%3A%2F%2Fwww.thimet.de%2FCalcCollection%2FCalculators%2FHP-31E%2FContents.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-HP-museum-32E-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-HP-museum-32E_9-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/hp32.htm">"HP-32E"</a>. <i>Museum of HP Calculators</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Museum+of+HP+Calculators&rft.atitle=HP-32E&rft_id=https%3A%2F%2Fwww.hpmuseum.org%2Fhp32.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> <li id="cite_note-HP-museum-37E-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-HP-museum-37E_10-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/features/37ef.htm">"HP-37E Features"</a>. <i>Museum of HP Calculators</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Museum+of+HP+Calculators&rft.atitle=HP-37E+Features&rft_id=https%3A%2F%2Fwww.hpmuseum.org%2Ffeatures%2F37ef.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HP_30_series&action=edit&section=7" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.hpmuseum.org/">Third Generation of HP Calculators (1978) on hpmuseum.org</a></li> <li><a rel="nofollow" class="external text" href="https://www.thimet.de/CalcCollection/HP-Series/HP-Models.html#Spice">HP-30 series description on thimet.de</a></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://apps.apple.com/de/app/rpn-32-ce/id1082637146">"HP-32E Calculator Simulator (iOS)"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-27</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=HP-32E+Calculator+Simulator+%28iOS%29&rft_id=https%3A%2F%2Fapps.apple.com%2Fde%2Fapp%2Frpn-32-ce%2Fid1082637146&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHP+30+series" class="Z3988"></span></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol 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title="Discuss this template" style="color:#FFFFFF">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:HP_calculators" title="Special:EditPage/Template:HP calculators"><abbr title="Edit this template" style="color:#FFFFFF">e</abbr></a></li></ul></div><div id="Hewlett-Packard_(HP)_calculators" style="font-size:114%;margin:0 4em"><a href="/wiki/HP_calculators" title="HP calculators"><span style="color:#FFFFFF;">Hewlett-Packard (HP) calculators</span></a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: #FFFFFF"><a href="/wiki/Comparison_of_HP_graphing_calculators" title="Comparison of HP graphing calculators">Graphing</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HP_9g" title="HP 9g">9g</a></li> <li><a href="/wiki/HP-28_series#HP_28C" title="HP-28 series">28C</a></li> <li><a href="/wiki/HP-28_series#HP_28S" title="HP-28 series">28S</a></li> <li><a href="/wiki/HP_38G" title="HP 38G">38G</a></li> <li><a href="/wiki/HP_39/40_series#39G" title="HP 39/40 series">39G</a></li> <li><a href="/wiki/HP_39/40_series#39g+" title="HP 39/40 series">39g+</a></li> <li><a href="/wiki/HP_39/40_series#39gs" title="HP 39/40 series">39gs</a></li> <li><a href="/wiki/HP_39/40_series#39gII" title="HP 39/40 series">39gII</a></li> <li><a href="/wiki/HP_39/40_series#40G" title="HP 39/40 series">40G</a></li> <li><a href="/wiki/HP_39/40_series#40gs" title="HP 39/40 series">40gs</a></li> <li><a href="/wiki/HP_48_series#48S" title="HP 48 series">48S</a></li> <li><a href="/wiki/HP_48_series#48SX" title="HP 48 series">48SX</a></li> <li><a href="/wiki/HP_48_series#48G" title="HP 48 series">48G</a></li> <li><a href="/wiki/HP_48_series#48G+" title="HP 48 series">48G+</a></li> <li><a href="/wiki/HP_48_series#48GX" title="HP 48 series">48GX</a></li> <li><a href="/wiki/HP_49/50_series#48gII" title="HP 49/50 series">48gII</a></li> <li><a href="/wiki/HP_49/50_series#49G" title="HP 49/50 series">49G</a></li> <li><a href="/wiki/HP_49/50_series#49g+" title="HP 49/50 series">49g+</a></li> <li><a href="/wiki/HP_49/50_series#50g" title="HP 49/50 series">50g</a></li> <li><a href="/wiki/HP_Prime" title="HP Prime">Prime</a></li> <li><a href="/wiki/HP_Xpander" title="HP Xpander">Xpander</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: #FFFFFF">Scientific programmable</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hewlett-Packard_Voyager_series#10C" title="Hewlett-Packard Voyager series">10C</a></li> <li><a href="/wiki/Hewlett-Packard_Voyager_series#11C" title="Hewlett-Packard Voyager series">11C</a></li> <li><a href="/wiki/HP-15C" title="HP-15C">15C</a> <ul><li><a href="/wiki/HP-15C#15CLE" title="HP-15C">LE</a></li> <li><a href="/wiki/HP-15C#15CCE" title="HP-15C">CE</a></li></ul></li> <li><a href="/wiki/HP-16C" title="HP-16C">16C</a></li> <li><a href="/wiki/HP-19C/-29C#19C" title="HP-19C/-29C">19C</a></li> <li><a href="/wiki/HP-20S" title="HP-20S">20S</a></li> <li><a href="/wiki/HP-21S" class="mw-redirect" title="HP-21S">21S</a></li> <li><a href="/wiki/HP-25#25" title="HP-25">25</a></li> <li><a href="/wiki/HP-25#25C" title="HP-25">25C</a></li> <li><a href="/wiki/HP-19C/-29C#29C" title="HP-19C/-29C">29C</a></li> <li><a href="/wiki/HP-32S" title="HP-32S">32S</a></li> <li><a href="/wiki/HP-32SII" class="mw-redirect" title="HP-32SII">32SII</a></li> <li><a href="/wiki/HP-33E/C" class="mw-redirect" title="HP-33E/C">33C</a></li> <li><a href="/wiki/HP-33E/C" class="mw-redirect" title="HP-33E/C">33E</a></li> <li><a href="/wiki/HP_33s" title="HP 33s">33s</a></li> <li><a href="/wiki/HP-34C" title="HP-34C">34C</a></li> <li><a href="/wiki/HP_35s" title="HP 35s">35s</a></li> <li><a href="/wiki/HP-41C" title="HP-41C">41C</a></li> <li><a href="/wiki/HP-41C#The_HP-41CV_and_CX" title="HP-41C">41CV</a></li> <li><a href="/wiki/HP-41C#The_HP-41CV_and_CX" title="HP-41C">41CX</a></li> <li><a href="/wiki/HP-42S" title="HP-42S">42S</a></li> <li><a href="/wiki/HP-55" title="HP-55">55</a></li> <li><a href="/wiki/HP-65" title="HP-65">65</a></li> <li><a href="/wiki/HP-67/97#67" title="HP-67/97">67</a></li> <li><a href="/wiki/HP-71B" title="HP-71B">71B</a></li> <li><a href="/w/index.php?title=HP-95C&action=edit&redlink=1" class="new" title="HP-95C (page does not exist)">95C</a></li> <li><a href="/wiki/HP-67/97#97" title="HP-67/97">97</a></li> <li><a href="/wiki/HP-67/97#97S" title="HP-67/97">97S</a></li> <li><a href="/wiki/Hewlett-Packard_9100A#9100A" title="Hewlett-Packard 9100A">9100A</a></li> <li><a href="/wiki/Hewlett-Packard_9100A#9100B" title="Hewlett-Packard 9100A">9100B</a></li> <li><a href="/w/index.php?title=Hewlett-Packard_9805&action=edit&redlink=1" class="new" title="Hewlett-Packard 9805 (page does not exist)">9805</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: #FFFFFF">Scientific non-programmable</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=HP_6s&action=edit&redlink=1" class="new" title="HP 6s (page does not exist)">6s</a></li> <li><a href="/w/index.php?title=HP_6s&action=edit&redlink=1" class="new" title="HP 6s (page does not exist)">6s Solar</a></li> <li><a href="/w/index.php?title=HP_8s&action=edit&redlink=1" class="new" title="HP 8s (page does not exist)">8s</a></li> <li><a href="/w/index.php?title=HP_9s&action=edit&redlink=1" class="new" title="HP 9s (page does not exist)">9s</a></li> <li><a href="/wiki/HP_10s" title="HP 10s">10s</a></li> <li><a href="/wiki/HP_10s#10s+" title="HP 10s">10s+</a></li> <li><a href="/wiki/HP_10s#10sII" title="HP 10s">10sII</a></li> <li><a href="/wiki/HP-21" title="HP-21">21</a></li> <li><a href="/wiki/HP-22S" title="HP-22S">22S</a></li> <li><a href="/wiki/HP-27" title="HP-27">27</a></li> <li><a href="/wiki/HP-27S" title="HP-27S">27S</a></li> <li><a href="/wiki/HP_30s" class="mw-redirect" title="HP 30s">30s</a></li> <li><a href="/wiki/HP-31E" class="mw-redirect" title="HP-31E">31E</a></li> <li><a href="/wiki/HP-32E" class="mw-redirect" title="HP-32E">32E</a></li> <li><a href="/wiki/HP-35" title="HP-35">35</a></li> <li><a href="/wiki/HP-45" title="HP-45">45</a></li> <li><a href="/w/index.php?title=HP-46&action=edit&redlink=1" class="new" title="HP-46 (page does not exist)">46</a></li> <li><a href="/w/index.php?title=HP-91&action=edit&redlink=1" class="new" title="HP-91 (page does not exist)">91</a></li> <li><a href="/w/index.php?title=HP_SmartCalc_series&action=edit&redlink=1" class="new" title="HP SmartCalc series (page does not exist)">300s</a></li> <li><a href="/w/index.php?title=HP_SmartCalc_series&action=edit&redlink=1" class="new" title="HP SmartCalc series (page does not exist)">300s+</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: #FFFFFF">Financial and business</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HP-10B#10B" title="HP-10B">10B</a></li> <li><a href="/wiki/HP-10B#10bII" title="HP-10B">10bII</a></li> <li><a href="/wiki/HP-10B#10bII+" title="HP-10B">10bII+</a></li> <li><a href="/wiki/HP-12C#12C" title="HP-12C">12C</a> <ul><li><a href="/wiki/HP-12C#12c_Platinum" title="HP-12C">Platinum</a></li> <li><a href="/wiki/HP-12C#12c_Prestige" title="HP-12C">Prestige</a></li></ul></li> <li><a href="/w/index.php?title=HP-14B&action=edit&redlink=1" class="new" title="HP-14B (page does not exist)">14B</a></li> <li><a href="/wiki/HP-17B" title="HP-17B">17B</a></li> <li><a href="/wiki/HP-17B#17BII" title="HP-17B">17BII</a></li> <li><a href="/wiki/HP-17B#17bII+" title="HP-17B">17bII+</a></li> <li><a href="/wiki/HP-18C" title="HP-18C">18C</a></li> <li><a href="/wiki/HP-19B" title="HP-19B">19B</a></li> <li><a href="/wiki/HP-19B#19BII" title="HP-19B">19BII</a></li> <li><a href="/wiki/HP_20b" title="HP 20b">20b</a></li> <li><a href="/wiki/HP-22" title="HP-22">22</a></li> <li><a href="/wiki/HP-27" title="HP-27">27</a></li> <li><a href="/wiki/HP_30b" title="HP 30b">30b</a></li> <li><a href="/wiki/HP-37E" class="mw-redirect" title="HP-37E">37E</a></li> <li><a href="/wiki/HP-38E/C#38C" class="mw-redirect" title="HP-38E/C">38C</a></li> <li><a href="/wiki/HP-38E/C#38E" class="mw-redirect" title="HP-38E/C">38E</a></li> <li><a href="/w/index.php?title=HP-70&action=edit&redlink=1" class="new" title="HP-70 (page does not exist)">70</a></li> <li><a href="/w/index.php?title=HP-80&action=edit&redlink=1" class="new" title="HP-80 (page does not exist)">80</a></li> <li><a href="/w/index.php?title=HP-81&action=edit&redlink=1" class="new" title="HP-81 (page does not exist)">81</a></li> <li><a href="/w/index.php?title=HP-92&action=edit&redlink=1" class="new" title="HP-92 (page does not exist)">92</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: #FFFFFF">Other</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HP-01" title="HP-01">01</a></li> <li><a href="/w/index.php?title=Hewlett-Packard_HP-10&action=edit&redlink=1" class="new" title="Hewlett-Packard HP-10 (page does not exist)">10</a></li> <li><a href="/wiki/HP_CalcPad_series" title="HP CalcPad series">CalcPad</a> <ul><li><a href="/wiki/HP_CalcPad_series#100" title="HP CalcPad series">100</a></li> <li><a href="/wiki/HP_CalcPad_series#200" title="HP CalcPad series">200</a></li></ul></li> <li><a href="/w/index.php?title=HP_QuickCalc_series&action=edit&redlink=1" class="new" title="HP QuickCalc series (page does not exist)">QuickCalc</a></li> <li><a href="/w/index.php?title=HP_EasyCalc_series&action=edit&redlink=1" class="new" title="HP EasyCalc series (page does not exist)">EasyCalc</a></li> <li><a href="/w/index.php?title=HP_OfficeCalc_series&action=edit&redlink=1" class="new" title="HP OfficeCalc series (page does not exist)">OfficeCalc</a></li> <li><a href="/w/index.php?title=HP_PrintCalc_series&action=edit&redlink=1" class="new" title="HP PrintCalc series (page does not exist)">PrintCalc</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: #FFFFFF">Related topics</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Reverse_Polish_notation" title="Reverse Polish notation">RPN</a></li> <li><a href="/wiki/RPL_(programming_language)" title="RPL (programming language)">RPL</a></li> <li><a href="/wiki/Prime_Programming_Language" class="mw-redirect" title="Prime Programming Language">PPL</a></li> <li><a href="/wiki/FOCAL_(Hewlett-Packard)" class="mw-redirect" title="FOCAL (Hewlett-Packard)">FOCAL</a></li> <li><a href="/wiki/Algebraic_input_method" class="mw-redirect" title="Algebraic input method">ALG</a></li> <li><a href="/wiki/Computer_algebra_system" title="Computer algebra system">CAS</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color: #FFFFFF">Emulation software</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/WRPN_Calculator" title="WRPN Calculator">16C</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" 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