Mark's Adding Machine

Mark's Adding Machine is a very nice application that allows users to transition easily from a classical adding machine to a software solution on their computer. The core functions of the program generally mimic those of a typical adding machine, with a few minor differences.
It comes with lots of features like basic operations, tape box features and spreadsheet integration.

Lightweight interface with lots of features at hand

Mark's Adding Machine doesn't take long to install and it doesn't have a complicated interface that you need to complete. It can be used for various and multiple operations, including basic operations, tape box features, spreadsheet integration, and macro keys.
You can use the application to add values, products, subtract immediate values, edit comments and more.

Make all sort of calculations

You have the option to bring up the dialog box to write down comments inside calculations. It comes with the feature to mark costs up or down and calculation discounts using percentages.
Negative values can be added, together with the option to save information in the clipboard. Lines in the tape box can be edited after entry by double-clicking on them.
The tape box will then be automatically recalculated to reflect the changes, if any, that you made to the double-clicked line.

More features and tools

Mark's Adding Machine also lets you calculate macros and import or export files inside the application. Links can be added and the application uses a text-to-speech features to read calculations and make it easier to check them.
It comes with multiple shortcuts from the keyboard to make it easier to make calculations. Other than that, it has the option to add links inside the application and to export information.
You can even print calculations easily, with the click of one button. All in all, Mark's Adding Machine is a very nice software solution, packed with all sort of tools for making calculations.