Does anyone out there have a #sharp E500s calculator with 256k internal memory?
I‘m just looking for a picture(!) of mainboard to help repairing a broken trace on mine. #followerpower #vintagecomputing #sharp_calculator #retrocomputing
#calculators

Cabri Jr. on the TI-84+: because nothing says “cutting-edge geometry” like pixelated shapes that move slower than dial-up internet on a rainy day.

My TI-84+ has so many limits, it practically aced calculus before I did!

Search Engine Roundtable: Google’s Mortgage Calculator Hasn’t Worked In A Week. “About a week ago, if you searched for mortgage related math questions in Google Search, Google stopped giving you the answer. Google first introduced its mortgage calculator features a decade ago but suddenly the features disappeared last weekend. I figured I’d give them several days before reporting on it but […]

https://rbfirehose.com/2025/03/22/search-engine-roundtable-googles-mortgage-calculator-hasnt-worked-in-a-week/

While the world builds AI Agents, I'm just building calculators — https://www.calcverse.live
#HackerNews #AI #Agents #Calculators #Innovation #Tech #Community #Building

After looking for a long time, I finally found this #Sliderule, which belonged to my late father. Some of you will know that these #devices were used, before the advent of digital #Calculators, to perform #arithmetic operations such as #multiplication and #division to about three significant figures, by #scientists and #engineers.

#Mathematics #Computation (1/2)

Who remembers #RPN (reverse Polish notation) in programmable #calculators?

This little mechanical calculator is one of my favorite objects. It came to me with what turned out to be a fouled 10s pin retaining ring; it was a bear to take apart, ‘machine’ a new part, and reassemble. But it works! And I love it!

Good morning, friends.

9 April 2024

When I was in high school, as I recall, we didn't have battery operated calculators. I'm not sure that they were a thing back then. Hmmm ... I need to look that up. ... Here's what I found out, the first battery operated portable calculator, the QT-8B was marketed by Sharp in mid-1970 (1). It was too large to be considered a pocket calculator and the cost was $495 (2), which is the equivalent of about $4K today. So, as you can imagine, we did all calculations by hand. There were slide rules and I suppose the abacus counts as well. There were mechanical calculators, and we were taught how to use them along with typewriters, in a Business Machines class.

"I am so old, I entered engineering school with a slide rule. And I left engineering school with a calculator. I can still use a slide rule but it's not a skill you especially need anymore". - Bill Nye

Today I learned about introductory posts here. So I'll add this in.
I'm an electrical engineer with a focus on transmission and distribution (T&D). Working there as a #OHS specialist, lead engineer, #QA engineer.
In my spare time I tinker with 8-bit computers, vintage #scopes and #meters, and general #electronics. Also collecting electronic #calculators and #SlideRules.

Here's me: (#introductions)
I'm mostly about #retrocomputing and #computerhistory with a bit of #vintagecomputers thrown in. Also #calculators especially #rpn and programmable. I like #space and science and history. I read a fair bit of fiction these days, including #sff. 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.

I co-moderate
https://retrocomputingforum.com