We wish to thank current active contributors to PSPP:
* Ben Pfaff wrote the initial program and manual, which comprises the
-majority of the current code. Ben continues to contribute and
+majority of the current code. Ben continues to contribute and
most of the core libraries which ensure that PSPP runs with optimal
speed are his work.
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.
+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.
+* 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: