N1bus Calculator is a simple desktop calculator to install on your computer. This is software that allows you to save your contacts easily, without having to open management software heavy. It is much more friendly than the original calculator included with the operating system. It is very lightweight, very fast at the beginning and very easy to use. The functions + Tax and Tax-allow you to instantly calculate the value TTC or find outside the tax value. The functions of memory are also available. Finally adjustment decimals is very easy and also incorporates the functions of conversion Franc / € uro and € uro / Franc.