What is SPSS?
I never expected visitors of this site would ask this question but many do!
The following brief definition is taken from the SPSS Base User's Guide.
"SPSS is a comprehensive system for analyzing data. SPSS can take data from almost any type of file and use them to generate tabulated reports, charts, and plots of distributions and trends, descriptive statistics, and complex statistical analysis."
See IBM's SPSS webpage for more information.