For the econometric analysis of time series data, Microfit 5.0 is an unrivalled package. With its extensive choice of data analysis options, this program is a versatile aid to all those interested in the evaluation and design of advanced univariate and multivariate time series models. Microfit 5.0 is an interactive, menu-driven program with a host of facilities for estimating, hypothesis testing, forecasting, data processing, file management, and graphic display. These features make Microfit 5.0 one of the most powerful menu-driven time-series econometric packages currently available. The strength of the package lies in the fact it can be used at different levels of technical sophistication. For experienced users of econometric programs, it offers a variety of univariate and multivariate estimation methods and provides a large number of diagnostic and non-nested tests not readily available on other packages. The interaction of excellent graphics and estimation capabilities in Microfit allows important econometric research to be carried out in a matter of days rather than weeks.