PyMatrix is a package, based on numarray, which provides matrix arithmetic for the Python user. This is version 0.0.0b Pre-Alpha release. Thanks to those who commented on the initial release in November 2003. The package is available for download from: http://www3.sympatico.ca/cjw/PyMatrix. I would appreciate comments on the current functionality and suggestions as to other capabilities which could usefully be integrated into the package. Prerequisite: numarray 0.9, which is available from: http://sourceforge.net/project/showfiles.php?group_id=1369 The package has been developed under Windows. Reports of usage under Linux would be of particular interest. Colin W.