14-04-2020, 07:18 AM
My first calculator was the Sinclair scientific, I still have it somewhere and it was working when last used. I may dig it out and try some error tests. I was good with a slide rule and still use one occasionally just to keep my hand in as I am from the last generation to have used one in anger. My favourite, to use, is still my Thornton AD150, I do like the double sided Thornton A010 but I haven't used it enough to be proficient. I moved onto a Casio FX501P from the Sinclair whilst my brother went the HP route.
I did like RPN.
I did like RPN.
