It’s therefore interesting to have a glimpse into where scientific calculators originated, and to have a first-hand account of what it meant to own one in an age of slide rules. The Sinclair ...

It first appeared in 1981 and has continued ... Financial calculators are not to be confused with scientific calculators and ...

Hewlett-Packard's 9100A, the world's first personal computer, was based on a prototype built by Tom Osborne of Cody. Called “The Green Machine,” it ...

After their first few years when they were a rare ... and a firmware which transforms it into a reverse Polish, or RPN, scientific calculator. The Sharp EL210 and EL215 were ubiquitous early ...