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#rpn

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amen zwa, esq.<p>"In today's video, we'll take a look at my grandfather's vintage HP-45 <a href="https://mathstodon.xyz/tags/calculator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calculator</span></a> from 1973"—so he opens.</p><p>As an <a href="https://mathstodon.xyz/tags/EE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>EE</span></a> who used <a href="https://mathstodon.xyz/tags/HP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HP</span></a> <a href="https://mathstodon.xyz/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> calculators for my whole career, that word, "grandfather", hit me hard.😀</p><p><a href="https://youtu.be/56nq_FNll6Q?si=m-he0vNtIriQTzhO" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">youtu.be/56nq_FNll6Q?si=m-he0v</span><span class="invisible">NtIriQTzhO</span></a></p>
noah<p>Anyone else ever used a <a href="https://tilde.zone/tags/rpn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rpn</span></a> <a href="https://tilde.zone/tags/calculator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calculator</span></a>? I've been using a <a href="https://tilde.zone/tags/SwissMicros" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SwissMicros</span></a> DM15L and I LOVE it soooo much. One of the best calculators I've ever used.</p><p><a href="https://tilde.zone/tags/tech" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tech</span></a> <a href="https://tilde.zone/tags/math" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>math</span></a> <a href="https://tilde.zone/tags/mathematics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mathematics</span></a> <a href="https://tilde.zone/tags/physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>physics</span></a></p>
amen zwa, esq.<p>Fighting Words</p><p>The <a href="https://mathstodon.xyz/tags/HP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HP</span></a>-15C (the original <a href="https://mathstodon.xyz/tags/Voyager" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Voyager</span></a> Series) is, far and away, the best <a href="https://mathstodon.xyz/tags/engineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>engineering</span></a> <a href="https://mathstodon.xyz/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> calculator, on balance: capability, size, shape, quality, durability, aesthetics.</p><p>OK, in a more civil tone, I realise my 15C is significantly less capable, in one way or another, than my 41CX, 32S, 28S, 48GX, 35s, Prime, ....</p><p>But why this irrational adoration?</p><p>Well, you'd know, if you're an engineer of a certain age who used calculators in your daily life.</p>
amen zwa, esq.<p>This <a href="https://mathstodon.xyz/tags/vintage" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>vintage</span></a> <a href="https://mathstodon.xyz/tags/HP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HP</span></a>-15C <a href="https://mathstodon.xyz/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> calculator is mighty fresh. Fortunate is the person who would win this auction on eBay.</p><p><a href="https://www.ebay.com/itm/356608852939?_skw=vintage+hp+calculator&amp;itmmeta=01JN9KWSWF24E4F45VF63SA9Z4&amp;hash=item53078b43cb:g:Qi8AAOSwU8dnvh1C&amp;itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1f7rKVXUs9MKpa8n2KoBljH8AS2sHwzd1At8Nzm420%2FuP10jDPnXh6qph5TBYTfZo0Se2hadxbsO7puf4XBHenft4voY21EFGG9X%2F31tqvFw9BOWy08FQh%2FniSUKUZ11ioH6Bf4Gu3darvQPZW4l%2FERG1LsPloxYWUwwyROVGJz1iAdqZ77PCJHyIsymHKEzAZ%2BsfdF7VvksCrDJNt37P0PdKQCDozOC29orcZVJ3V0ABlk3RpBBsImkq5AC6UUr7ABW39DMCUv8%2BiRXKO4gxchPFD%2Fc961mLGaeKUFwvNcPA%3D%3D%7Ctkp%3ABk9SR7ie87OqZQ" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">ebay.com/itm/356608852939?_skw</span><span class="invisible">=vintage+hp+calculator&amp;itmmeta=01JN9KWSWF24E4F45VF63SA9Z4&amp;hash=item53078b43cb:g:Qi8AAOSwU8dnvh1C&amp;itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1f7rKVXUs9MKpa8n2KoBljH8AS2sHwzd1At8Nzm420%2FuP10jDPnXh6qph5TBYTfZo0Se2hadxbsO7puf4XBHenft4voY21EFGG9X%2F31tqvFw9BOWy08FQh%2FniSUKUZ11ioH6Bf4Gu3darvQPZW4l%2FERG1LsPloxYWUwwyROVGJz1iAdqZ77PCJHyIsymHKEzAZ%2BsfdF7VvksCrDJNt37P0PdKQCDozOC29orcZVJ3V0ABlk3RpBBsImkq5AC6UUr7ABW39DMCUv8%2BiRXKO4gxchPFD%2Fc961mLGaeKUFwvNcPA%3D%3D%7Ctkp%3ABk9SR7ie87OqZQ</span></a></p>
Les capsules du prof Lutz<p>⬆️ 👀 <span class="h-card" translate="no"><a href="https://merveilles.town/@neauoire" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>neauoire</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.online/@raph" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>raph</span></a></span> This page has even big PS code chunks in it! 🍪 Not using Cornu spirals, but cool to see PS in the wild.</p><p><a href="https://mamot.fr/tags/stack" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>stack</span></a> <a href="https://mamot.fr/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> <a href="https://mamot.fr/tags/ProgLang" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ProgLang</span></a> <a href="https://mamot.fr/tags/Postscript" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Postscript</span></a> <a href="https://mamot.fr/tags/computer_graphics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>computer_graphics</span></a> <a href="https://mamot.fr/tags/FontDesign" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FontDesign</span></a></p>
:ms_robot_grin: la .samflir. :ms_robot_pats:<p><span class="h-card" translate="no"><a href="https://mathstodon.xyz/@AmenZwa" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>AmenZwa</span></a></span> Agreed! My <a href="https://tech.lgbt/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> <a href="https://tech.lgbt/tags/calculators" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calculators</span></a> are a HP-12C, DM16L, DM42 and HP Prime. I also use Free42 on my phone.</p>
amen zwa, esq.<p>Fighting Words:</p><p>If you, like me, are still using <a href="https://mathstodon.xyz/tags/calculators" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calculators</span></a> in 2025, the only sensible input method for such ingenious devices is the equally ingenious Reverse-Polish Notation (<a href="https://mathstodon.xyz/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a>), and the only acceptable manufacturer of such devices was the original Hewlett-Packard (HP).</p><p>Vintage <a href="https://mathstodon.xyz/tags/HP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HP</span></a> RPN all the way, baby! Ah well, OK; new <a href="https://mathstodon.xyz/tags/SwissMicros" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SwissMicros</span></a> RPN, too.</p>
jos<p><a href="https://mastodon.social/tags/free42" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>free42</span></a> une super calculatrice HP <a href="https://mastodon.social/tags/rpn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rpn</span></a> customisable ! Et quelle puissance !<br>Ça nous replonge dans les années d'autrefois ! <br><a href="https://mastodon.social/tags/geek" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geek</span></a> <a href="https://mastodon.social/tags/calculators" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calculators</span></a> <a href="https://mastodon.social/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>linux</span></a></p>
amen zwa, esq.<p>In my career as an <a href="https://mathstodon.xyz/tags/ElectricalEngineer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ElectricalEngineer</span></a> <a href="https://mathstodon.xyz/tags/EE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>EE</span></a> over the past four decades, I've used several <a href="https://mathstodon.xyz/tags/HP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HP</span></a> <a href="https://mathstodon.xyz/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> <a href="https://mathstodon.xyz/tags/calculators" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calculators</span></a> (yes, only RPN). Of all those, my absolute favourites, in descending preference, are these:</p><p>•&nbsp;HP-15C<br>• HP-41CX<br>•&nbsp;HP-32S<br>• HP-35s</p>
James Thomson<p>It's the last day for my Black Friday sales - everything is 50% off today!</p><p>🧬 PCalc, my highly configurable scientific calculator with <a href="https://mastodon.social/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> support, is only $4.99 USD.</p><p>iOS / iPadOS / watchOS / visionOS: <br><a href="https://pcalc.com/store/pcalc" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">pcalc.com/store/pcalc</span><span class="invisible"></span></a></p><p>macOS: <br><a href="https://pcalc.com/store/pcalcmac" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">pcalc.com/store/pcalcmac</span><span class="invisible"></span></a></p><p>🎲 Dice by PCalc, my 3D physics based <a href="https://mastodon.social/tags/TTRPG" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TTRPG</span></a> dice app, is only $0.99 USD.</p><p>iOS / iPadOS / watchOS: <br><a href="https://pcalc.com/store/dice" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">pcalc.com/store/dice</span><span class="invisible"></span></a></p><p>macOS: <br><a href="https://pcalc.com/store/dicemac" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">pcalc.com/store/dicemac</span><span class="invisible"></span></a></p><p>Note that I actually say what my apps do, unlike my previous posts! <a href="https://mastodon.social/tags/marketing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>marketing</span></a></p>
amen zwa, esq.<p>My friends on <a href="https://mathstodon.xyz/tags/MathsTodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MathsTodon</span></a>.xyz know that I'm a nut for the <a href="https://mathstodon.xyz/tags/HP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HP</span></a> <a href="https://mathstodon.xyz/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a> calculators, specifically the HP-41CX, HP-15C, and HP-32S. But, out of curiosity, I added the HP-48SX to my collection a couple of weeks ago, because I got a fresh one on eBay for cheap.</p><p>As many HP RPN calculators fans know, the 48SX is quite advanced (a worthy successor the inimitable HP-28S graphing calculator), but with a horrid, low-contrast display. Nevertheless, since the 48 postdates my career by more than a decade and I've never used one in anger, I couldn't resist this cheap thrill.</p><p>NB—If you're looking for the most advanced HP RPN calculator, look no further, it's the HP Prime. But if you're seeking the most advanced in the classic line, that's the HP-48GX. After several days of playing with this 1990s peak performer, I'd gladly stay with my 1970s king, the HP-41CX.</p><p><a href="https://amenzwa.github.io/stem/ComputingHistory/HowRPNCalculatorsWork/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">amenzwa.github.io/stem/Computi</span><span class="invisible">ngHistory/HowRPNCalculatorsWork/</span></a></p>
Jens Hannemann<p><span class="h-card" translate="no"><a href="https://oldbytes.space/@Wintermute_BBS" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>Wintermute_BBS</span></a></span> Wow, if I remember correctly, that was the first compiler I ever bought. Forth is awesome! <a href="https://mastodon.online/tags/RPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RPN</span></a></p>
Ed S<p>Here's me: (<a href="https://mastodon.sdf.org/tags/introductions" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>introductions</span></a>)<br>I'm mostly about <a href="https://mastodon.sdf.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retrocomputing</span></a> and <a href="https://mastodon.sdf.org/tags/computerhistory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>computerhistory</span></a> with a bit of <a href="https://mastodon.sdf.org/tags/vintagecomputers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>vintagecomputers</span></a> thrown in. Also <a href="https://mastodon.sdf.org/tags/calculators" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calculators</span></a> especially <a href="https://mastodon.sdf.org/tags/rpn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rpn</span></a> and programmable. I like <a href="https://mastodon.sdf.org/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a> and science and history. I read a fair bit of fiction these days, including <a href="https://mastodon.sdf.org/tags/sff" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sff</span></a>. I like languages, human and computer. I'm from the 70s culturally, 80s technologically but the 60s biologically. I avoid talk of current events. I try to use CWs and to be an ally.</p><p>I co-moderate<br><a href="https://retrocomputingforum.com" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="">retrocomputingforum.com</span><span class="invisible"></span></a></p>
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