UNISTAT for Windows is a comprehensive stand-alone statistical package that can also work as Excel add-in. In stand-alone mode (i.e. when it is run independent of Excel) it has few limitations on the size of data files. Users can handle files with millions of rows and thousands of variables. The only limiting factor is the PC’s memory. In Excel add-in mode, the data capacity is limited with Excel’s capacity. The software stores and processes data in double precision. Together with the choice of numerically stable algorithms, this ensures a high degree of accuracy of results.