We like mechanical calculators like slide rules ... As the name implies, the derivimeter finds the derivative of a function. To do that, you have to plot the function on a piece of paper that ...

Prices dropped as new features were added and sales doubled each year. By 1976, a four-function calculator cost only a few dollars. In 1972, 5 million calculators were sold in the US and within ...

It’s not a full scientific calculator, but it does have enough functions to go beyond what you normally find in basic calculators. The free version of the app contains advertising. It’s a good ...

That update also added a conversion function to your Calculator app. That means you can convert things like currency, temperature and weight right from your calculator without opening a web ...