This archive includes MPI programs which resolve Laplace equations with SOR. The programs have no time stepping part. They are intended to demonstrate the performance of the solution on linearlized equations. Programs was confirmed with LAM6.0 and miniMPI of NEC-Cenju3. The main purpose of this archive is demonstration of Parallel Pipelining SOR Method, developed by me. The archive also includes multicolor SOR method for compalison. The files in this archive Readme.txt: This file. Readme.jis: Japanese version of this file pgslp.h: common header file. ps.c: Program of Parallel Pipelining SOR Method. pp.c: Program of Duallane Parallel Pipelining SOR Method. mc.c: Program of Multicolor SOR Method. This program is copyright protected, and should not use commercially any fragment without permission of the author. As for research and/or study purposes you can distribute the archive without any modification to the programs and/or documantations. Contact:Naohiko Shimizu, School of Engineering, Tokai University. 1117 Kitakaname, Kanagawa 259-12 Japan email:nshimizu@et.u-tokai.ac.jp TEL: +81-463-58-1211(ext.4084) FAX: +81-463-58-8320