SPSS:	Statistical Package for the Social Sciences - ''"a computer program used for statistical analysis and is also the name of the company (SPSS Inc.) that sells it."''

http://en.wikipedia.org/wiki/SPSS

a set of PowerfulAdHocDataProcessingTools, focused on mathematical statistical analysis of data, but also useful for general data manipulation and processing.

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See also: StatisticalAnalysisSystem (SAS)
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CategoryStatistics