most of the core libraries which ensure that PSPP runs with optimal
speed are his work.
-* John Darrington wrote the graphical user interface, and the T-TEST,
-ONEWAY, EXAMINE, RANK and NPAR TESTS commands, implemented support
-for long variable names, psql and gnumeric and made numerous revisions
-to other modules.
+* John Darrington wrote the initial version of the graphical user interface,
+and many of the statistical procedures. John also implemented support for
+long variable names, PostgreSQL and Gnumeric and made numerous
+revisions to other modules.
* Jason Stover contributed statistical and numerical functionality,
including lib/gslextras and the linear regression features. Jason
is also an important contributor to GSL, which is used by PSPP.
+* Mehmet Hakan Satman wrote the QUICK CLUSTER command.
+
+* Friedrich Beckmann wrote the GRAPH command.
We also thank past contributors: