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
+* 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.
including lib/gslextras and the linear regression features. Jason
is also an important contributor to GSL, which is used by PSPP.
-* Harry Thijssen contributed and maintains the Dutch translation.
+* Mehmet Hakan Satman provided the initial implementation of the QUICK CLUSTER command.
+ Alan Mead and others contributed later improvements including the cluster membership subcommands.
+
+* Friedrich Beckmann wrote the GRAPH command.
We also thank past contributors: