X-12-ARIMA was the U.S. Census Bureau's software package for seasonal adjustment. X-12-ARIMA can be used together with many statistical packages, such as Gretl or EViews which provides a graphical user interface for X-12-ARIMA, and NumXL which avails X-12-ARIMA functionality in Microsoft Excel. Notable statistical agencies presently using X-12-ARIMA for seasonal adjustment include Statistics Canada and the U.S.