The file report.ps contains the CSRI technical report: Assessing and Comparing the Usability of Parallel Programming Systems by Gregory V. Wilson (CSRI, University of Toronto) R. Bruce Irvin (Dept. of Computer Science, University of Wisconsin) If you have the UNIX uncompress program, get the report.ps.Z file. Remember to transfer the file in binary mode. Uncompress it, and print it on a postscript printer. If you do not have uncompress, get the report.ps file in ascii mode, and print it on a postscript printer. This report was made available for anonymous ftp by: gvw@csri.toronto.edu ABSTRACT Parallel programming is widely acknowledged to be more difficult than sequential programming. One reason for this is that parallel programming systems are more difficult to use than their sequential counterparts. In particular, few parallel programming systems can support the software engineering requirements of large applications. We intend to assess and compare the usability of a variety of parallel programming systems using a small suite of chained applications called the Cowichan Problems.