Software calculator

They are among the simpler interactive software tools, and, as such, they provide operations for the user to select one at a time.

They can be used to perform any process that consists of a sequence of steps each of which applies one of these operations, and have no purpose other than these processes, because the operations are the sole, or at least the primary, features of the calculator, rather than being secondary features that support other functionality that is not normally known simply as calculation.

For example, the LEO computer was designed to run business application software such as payroll.

The most recent hardware calculators are electronic hand-held devices with buttons for digits and operations, and a small display for inputs and results.

No longer limited to a set of trigonometric and simple algebraic expressions, versions of the software calculator are now tailored to any and all topical applications.