GNU PSPP is a program for statistical analysis of sampled data. It is a
Free replacement for the proprietary program SPSS, and appears very
similar to it with a few exceptions.
The most important of these exceptions are, that there are no
your copy of PSPP will not “expire” or deliberately stop working
in the future.
Neither are there any artificial limits on
the number of cases or variables which you can use.
There are no additional packages to purchase in order to get
all functionality that PSPP currently supports is in the core package.
PSPP is a stable and reliable application.
It can perform descriptive statistics, T-tests, anova, linear and logistic regression,
measures of association, cluster analysis, reliability and factor analysis,
non-parametric tests and more.
Its backend is designed to perform its analyses as fast as possible, regardless
of the size of the input data.
You can use PSPP with its graphical interface or the more traditional
A brief list of some of the PSPP's features follows below.
We also made available a page with screenshots and sample output.
- Support for over 1 billion cases.
- Support for over 1 billion variables.
- Syntax and data files which are compatible with those of SPSS.
- A choice of terminal or graphical user interface.
- A choice of text, postscript, pdf,
html output formats.
- Inter-operability with
other free software.
- Easy data import from spreadsheets, text files and database sources.
- The capability to open, analyse and edit two or more datasets concurrently. They can also be merged, joined or concatenated.
- A user interface supporting all common character sets and which has been translated to
- Fast statistical procedures, even on very large data sets.
- No license fees.
- No expiration period.
- No unethical “end user license agreements”.
- A fully indexed user manual.
- Freedom ensured; It is licensed under the
GPLv3 or later.
- Portability; Runs on many different computers and many different operating systems (GNU or GNU/Linux are the prefered platforms, but we have had many reports that it runs well on other systems too).
PSPP is particularly aimed at statisticians, social scientists and
students requiring fast convenient analysis of sampled data.
As with most GNU software, PSPP can be found on the main GNU ftp server:
(via HTTP) and
(via FTP). It can also be found
on the GNU mirrors;
a mirror if possible.
There are some additional ways you
can download or otherwise obtain PSPP.
is available online, as
is documentation for most GNU software. You may
also find more information about
or by looking at
or similar directories on your system. A brief summary is available by
running pspp --help.
For further information, please browse our list of
frequently asked questions to see if
your issue is mentioned there.
If it is not, you might also want to peruse the archives of our mailing list,
issue may have been discussed there.
Failing that, you are welcome to
to the list, and send a question of your own.
If you believe you have found a bug in PSPP, please report it either
by sending a message to the mailing list
or by using the
Announcements about PSPP are made on
as well as (in common with most other GNU software)
Development of PSPP
and GNU in general, is a volunteer effort, and you can contribute. For
information, please read How to help GNU. If you'd
like to get involved, it's a good idea to join the discussion mailing
list (see above).
- Test releases
- Trying the latest test release (when available) is always
appreciated. Test releases of PSPP
can be found at
(via HTTP) and
- Reliability and accuracy of PSPP is something we take seriously.
Accordingly, in addition to regular manual testing,
including automatic regression tests are typically run every day.
- For development sources, issue trackers, and other
information, please see the
- Translating PSPP
- To translate PSPP's messages into other languages, please see the Translation Project
page for PSPP.
If you have a new translation of the message strings,
or updates to the existing strings, please have the changes made in this
repository. Only translations from this site will be incorporated into
For more information, see the Translation
- PSPP is currently being maintained by Ben Pfaff.
Please use the mailing lists for contact.
is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.