It's been more than 20 years since I bought a physical, hold-it-in-your-hand calculator. I've bought a couple of special-purpose calculator apps, but the very last one I bought was the TI-1726, which ...

Scientific calculators were invaluable to most of us through high school and college, freeing us from the yoke of using tables to calculate logarithms and trigonometric functions. Once out in the real ...