Cool.

"Since 2016, Maletic has amassed about 250 vintage calculators of all shapes and sizes. He’s putting about 100 pieces from his collection on display for a pop-up exhibit, “Calculators 1968-1983,” opening Aug. 18-20 in Portland."

https://www.youtube.com/watch?v=2On8mhPtZ3I

#RetroCalculators #Calculators #VIdeos #USA #Technology #History

This is my dad’s #HP25 #calculator that he still uses! Data entry is reverse Polish notation, of course.

Wanted to show this to Topaz Rabbit @Topaz - he has some really great retro calculator and computer stuff on his profile.

#RetroComputing #retrocalculators
#RPNcalc #rpncalculator

@LordArse Cool. @EdS

#RetroCalculators #Calculators

Calculators now emulated on the Internet Archive.

"The Calculator Drawer is smaller than these other collections, but they possess a hearty collection of graphing and simple Calculators, emulated in MAME and with an additional layer of presenting the calculator itself, as a clickable graphical object, which you can then do math and graphing on."

https://blog.archive.org/2023/01/29/a-calculated-move-calculators-now-emulated-at-internet-archive/

#Calculators #RetroCalculators #History #Technology #Emulation

@EdS

For my buddy @gpowerf #xp #RetroCalculators

One of my old calculators. And yeah, I do occasionally use it. #xp #retrocalculators

One of my old calculators. And yeah, I will occasionally use it. #xp #retrocalculators

A heady mix of #retrocomputing, #1970s #retrocalculators & #photography for Wednesday. Here's my HP-45: still in perfect working order, having previously been owned by a nuclear/aviation professor. (If you want to try one out, I wrote a terminal-based simulator which runs the original HP-45 ROM code for Z80 CP/M, Mac, Windows & Linux: HP45TERM is on my website.)
—
#calculator #retro #rpn

Snapped at the technical museum in Prague during the summer.

#retrocomputing #retrocalculators #commodore

@Rp12Biker My dad had this huge digital HP calculator in the 1970s. When you turned it on, it usually created interference on the reception of the family room TV's VHF stations.

#retrocomputing #retrocalculators

As you know, I also like older calculators. I got this little #Commodore #SR4190 years ago as an addition to a #Sinclair #ZX81. I'm still amazed that the two got along so well in the package. With a new battery pack for a wireless phone it runs nearly like the first day.
#RetroComputing #RetroCalculators

As you know, I also have a fondness for old-style calculators. I got this little #Commodore #SR4190 years ago as an encore to a #Sinclair #ZX81. I'm still amazed that the two got along so well in the package.
#RetroComputing #RetroCalculators

#Olympia calculator #RAE4/30 with 15 digit Nixie tubes. Not really calcs something in the moment, but our radio mate works on it.
#RetroComputing #retrocalculators

Interesting artefact.

"The Sinclair Instrument Wrist Calculator was a simple 8-digit calculator, that was only sold as a mail-order kit. It was released in February 1977 by Sinclair Instrument, a company ran in parallel with Sinclair Radionics. It originally sold for £9.95 (plus VAT)."

https://www.computinghistory.org.uk/det/52845/Sinclair-Instrument-Wrist-Calculator/

#Calculators #CalculatorHistory #RetroCalculators

An interesting rarity: a Commodore C202 adding machine.

#RetroCalculators #Technology #AddingMachines #Calculators

https://twitter.com/DatassetteUser/status/1156809722856660992

@EdS

A post on Olivetti’s Programma 101 calculator from the 1960s.

#RetroCalculators #RetroComputing #Calculators #ComputerHistory #Italy #Olivetti

https://spectrum.ieee.org/tech-history/silicon-revolution/the-calculator-that-helped-land-men-on-the-moon

"Dallas (AP) -- Jerry Merryman, one of the inventors of the hand-held electronic calculator who is described by those who knew him as not only brilliant but also kind with a good sense of humor, has died. He was 86."

#ComputerHistory #Calculators #Technology #RetroComputing #RetroCalculators

https://www.bloomberg.com/news/articles/2019-03-05/-brilliant-man-who-was-an-inventor-of-the-calculator-dies

A twitter thread looking at the Omron 88 calculator.

"foone @Foone

Check out this fun calculator I found at a thrift shop this weekend:

An Omron 88! This is an 8-digit VFD calculator from 1975."

#RetroCalculators

https://twitter.com/Foone/status/1087594229306580992

@EdS