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PSPP - mklabgr - 06-22-2026
PSPP is a free and open-source statistical analysis program developed as part of the GNU Project. It was created as a freely available alternative to IBM SPSS Statistics, offering both a graphical interface and a command-line environment. Written mainly in C and using the GNU Scientific Library for mathematical routines, PSPP runs on Linux, Windows, macOS, and other GNU-compatible systems. It began in the late 1990s under the name Fiasco, motivated by the desire to provide statistical software that users could freely copy, modify, and distribute.
The program supports many common statistical techniques, including descriptive statistics, frequency tables, cross-tabulations, $t$-tests, one-way ANOVA, linear and logistic regression, Cronbach's alpha, chi-square tests, non-parametric tests, factor analysis, cluster analysis, and principal component analysis. It can import data from formats such as CSV, OpenDocument spreadsheets and PostgreSQL databases, while producing tables and graphs in formats including PDF, HTML, SVG and PostScript. Because it is free and relatively similar to SPSS, PSPP is particularly useful for students, educators, researchers and organizations that need statistical analysis without the cost of proprietary software.
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