Calculator Community

Whether you’re a player or a Dungeon Master, the DND HP Calculator saves time and ensures precision.

R47 officially goes on sale, early bird discount available here: 47calc.com/ #calculators @calculators #rpn #hp

TLDR; Stick with the CG50 unless you find the new UI compelling

A calculator you would approve of @SmartmanApps ! This might be one of my favourite algebraic #calculators, but then I was always a fan of Sharps. @calculators

I picked this up in an antique shop when I was a kid, maybe 15 years ago. I guess I lost the stylus along the way.

I got this HP-17Bii recently - it's my first Pioneer model. I didn't realise until I got it that the keys are in fact double shot (thought double shot was limited to HP ancient history). Even the shift key is a big hunk of yellow resin embedded in a regular key by the looks of it.

The TI-86 is my absolute favorite calculator. I find it a pleasure to program for, I love the custom menu buttons, and I love the screen compared to that of the 83/84. I love the design, the uniform buttons and dark color scheme look very professional. This is my second one, after the screen died in my original baby that got me through high school and college. Which leads me to another thing I love about it, they are dirt cheap on eBay. Most are under $20.

Found my old grade school calculator while going through some drawers. It's not programmable or retro (yet) or valuable, but it served me well for many, many years.

Spotted this at my local flea market. My first VFD display!

Yes it might not appear to align right, but that's only because the ruler is slightly above the calculator.

I couldn't find the exact pixel dimensions for this calculator, so I just measured it myself.

Yes, 355÷113 is very close to π, but is not equal to π

The calculator as a whole seems to work perfectly, but can anyone explain Casio's choice of the shape of their flashing text entry cursor?

DM50 Calculator

It's the one on the left. We're allowed any calculator that's not programmable and cannot store text. The Elektronika can be programmed though it cannot store a program when turned off.

Crossposted from https://lemmy.world/post/24154232

My dad says he's never replaced the battery in it. We saw this in a home video and laughed when we found the still uses it 40 years later.

The official Swissmicros 2-line firmware dropped on the Winter Solstice as an early Christmas present. It also has a nice set of constants and conversions.

I'd been toying with the idea of what RPN calculator a kid could use at school here in the UK. I thought the sticking point would be that most RPNs are programmable, but turns out that isn't an explicit exclusion on the JCQ calculator guidance for GCSE and A-level exams. They can also use graphic calculators. There is a hard no on CAS. The HP-15c seemed the least likely to cause issues with invigilators, so went for this. We'll have to see if it works out though.

Here's a video from Chris Staecker showing off a similar one: https://youtu.be/2mv45XP48bQ?si=BJmt9rRG-wXdn_jA

The TI-nspire CX CAS was my first calculator with in integrated CAS, and it was a revelation! I was amazed that a handheld calculator could do symbolic logic, even though the technology goes back to the late '90s. I just never knew that it was a thing. The UI and software for the CX is almost identical to the CX II, though the CX II is more than twice as fast. The touchpad in the middle of the directional button was also improved quite a bit on the CX II. I still use this guy quite a bit, just because it is a special calculator to me. The CAS is not as full-featured as that on either the HP Prime or the Casio fx-CG500, but still powerful as hell. The CX also does not have the third-party support that the TI-89 Titanium has, but is many times faster than it and has the benefit of using a UI that was designed for its form factor.

This example was manufactured on the 7th week of 1979.

I've had this guy for about a 18 months and it is one of my favorites. It is slower than the HP Prime and the TI-nspire CX II CAS, but still blows the TI-89 Titanium out of the water as far as speed goes. The huge touchscreen gives it a unique UI that is easier to navigate than the TIs. I've found that this is the best of my collection for linear algebra, and it is the easiest of my CAS calculators to use.

I've seen these guys floating around on various sites, retailing for around $40 USD, but that was always too expensive for something that I figured would be sub-par. About a month ago, I saw one on eBay for $8, new and in the box. So here we are!

These are the tests which can give you quite a good profile and accuracy rating for your financial calculator. Any more contributions and confirmation are very much appreciated and I will update the swissmicros page (though I may need to move it off there at some point).

RPN83P running on the TI-83 Plus

A random shot of my calculator 5000 miles from home while I enjoy a beer near the Pacific. We had been discussing how much water was on earth and what size of a ball it would make. I have no affiliation with the brewing company so apologies for the product placement.

I just got an email from Casio Education saying that the next graphing calculator is coming next summer, and that prototypes will be shown off at the National Council of Teachers of Match Expo. I'm in the Chicago area, but tickets for non-members are way outside of my discretionary budget. If anybody is going, you'll have to fill us in!

HP's most accurate financial calculator, oddly enough, and despite only returning the ceiling of solve-for-n.

First post on Lemmy, and i see you like pens too :)

Sorry the angle is a little funky, but this is one of my two workhorses, the Casio BN-20. This guy gets used almost every day, and is my primary source of truth for my calendar and contacts. It was released in 1998 and has 2 MB of user memory. The spreadsheet function is pretty rudimentary, and the only function that I don't have a lot of experience with. The expense function is the best expense tool I've ever seen on an electronic organizer. I run Xubuntu on modern hardware and can sync the data using Casio PC Sync through Wine and with a USB to serial converter.

Someone gave this to me 15 or so years ago.

Not really a calculator, but I saw that someone posted a series 3 :)

A gift from my Calculus teacher upon graduation.

This is the calculator that got me through junior high and high school. It even handles fractions, which is what you see on the display there.

The Curta mechanical calculators were designed by the Austrian engineer Curt Herzstark, with initial designs from the early 1930s – being half-Jewish, he finished the design while being held prisoner at the Buchenwald concentration camp.

My last acquisition has finally arrived. I am very happy

This Casio took me through school, and most of uni. Well battle worn, still working. Please dont send me to calculator jail xD.

You can see the bits moving around inside when you use it.

Does anybody else find it odd that the HP Prime stashes the vector field plots in the Geometry app instead of the Advanced Graphing app?

My 30+ year-old Casio fx-7700G is the oldest calculator in my collection. It's a little worn, but still works and gets used! It's been a wonderful companion over the years.

Having used a Ti84+ and Casio FX83GT for my secondary education, and borrowing a HP32 from a classmate at university I really like the stack approach and rpn so I caved with a HP35s which mostly did the job but wasn't pocketable and a bit clumsy for me I found a HP32sii and snapped it up becoming my daily driver for a long time. It scratched an itch i didn't know i had, then wanting to expand my programming and plotting I didnt like the look of the 49g and the 50g being out of my budget I found a nice HP48G that sits on my desk for the more complex work where the RPL hits the needs as well as a "quick" plotter. Even managed to bond with the older grumpy engineers over the calculators and rpn. Im sure my collection will continue to grow.

I absolutely love this calculator, with one important caveat: I will never do integrations with this machine except as a test. Its integration algorithm tips over at ridiculously low speeds when it comes to edge cases. I find that it adds to the Sharp's charm, but it definitely affects its usefulness. Aside from that, this nifty little guy has a few features that you can't find on other calculators, and is arguably the best one out there for statistics and tables.

I got it in 1999 or so. TI-basic was my first-ever intro to programming.

I found this guy used on shopgoodwill.com for about $20 USD a few months ago. It was on my list of calculators to procure, but the going rate of $130 USD for a new one was way out of my range. I was ecstatic to find one in such great shape for a low price! This is an amazing calculator with some glaring issues that make it more of a mixed bag than it could have been.

I don't know much (or anything) about calculators, but I wanted to share a select few that I thought looked cool. Here's the museum's website: https://www.kennettclassic.com/

I've spent a couple of months with this guy, buying it just after it was released in the US. I've long been a fan of the 991EX, and the CW is quite a different beast in terms of UI and capabilities.

This lovely guy is the first HP calculator in my collection. I got it used from a member of the calculator subreddit a week ago, and am still getting used to it.

Do you collect calculators, have something cool to show off, or have a question about how to do something with your lovely chunk of plastic that plays with numbers? Feel free to post it here. Welcome, everyone!