This rewrite of the Message Passing Toolkit: PVM Programmer's Manual, supports the 1.3 release of the Cray Message Passing Toolkit and the Message Passing Toolkit for IRIX (MPT). The MPT implementation of PVM for UNICOS, UNICOS/mk, and IRIX systems contained in this release is based on the Oak Ridge National Laboratories (ORNL) version 3.3.10.

With MPT release 1.3, support for XPVM has been dropped.