Keep computing power at your side, on your desk or in your pocket in order to make quick calculations. Calculators make basic arithmetic easy, but can also create accounting records and make quick work of logarithmic or financial equations. Financial calculators include functions for calculating future values and depreciation. Scientific calculators will cover exponential and trigonometric functions with graphic calculators charting formulas on screen. Printing calculators let you show your work, keeping a log of inputs and results.