A pocket calculator is a small calculator that helps people do mathematics.

He took a small calculator from his pocket and began punching its buttons.

He used a small mechanical calculator to solve each problem, a laborious process later rapidly accomplished by computer.

Near it, on its own stand, was a small electric calculator.

After this time, the market for slide rules dwindled quickly as small scientific calculators became even more affordable.

Coop reached into the inside pocket of his coat and pulled out a small hand-held calculator.

This method facilitated the development of ever smaller scientific calculators.

After this time, the market for slide rules dried up quickly as small scientific calculators became affordable.

It's a small solar-powered calculator that looks like a credit card.

He wore a lab coat and carried a small calculator in his hand.