SYSTAT is one of the products from SYSTAT Software Inc. (SSI). It is a statistics and graphics package for technical professionals in the areas of Data Analysis and Modelling. Launched in the mid eighties during last century, it has been used in the fields of Life Sciences, Bio-medical, Environmental Sciences, Automobile, Pharmaceuticals, etc. In recent years, it was acquired from SPSS Science.
SYSTAT 10 was released in Spring 2001. The Mixed Regression tool for random effects analysis of hierarchical data was one of the new features in this release coming out with full documentations and examples. By the end of 2002, SYSTAT 10.2 has been released but with little added to the Mixed Regression facilities.
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