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A Digital 10-Key Calculator that mirrors real-life

How to reload Pentacalc on your computer?

Upgrade or reload your OS and need to reinstall Pentacalc?

If you just upgraded or reloaded your computer and need a fresh copy of PentaCalc, all you need to do is ask. Just email sales@pentacalc.com and provide your original order number, email address on the order, or name on the order and we will send you a fresh copy to make sure you have the most powerful calculator software ever!