calculators

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....

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

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

My 71B is telling me “Data Error” whenever I try to use the variable “F” - any ideas?

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

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...

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

So HP calculators have been … well not frequent. And from the perspective of a casual calculator user HP might as well not exist. If you wanna buy a new useful scientific calculator it’s TI or Casio and maybe sharp. However with the recent announcement that there would be a collectors edition re-release of the HP 15c 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....

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...