The mpich implementation comes with several kinds of documentation. Installers are encouraged to provide site-specific information, such as the location of the installation (particularly if it is not in /usr/local/mpich-1.2.2).
A complete set of Unix man pages for the mpich implementation are in mpich/man. man/man1 contains the commands for compiling, linking, and running MPI programs; man/man3 contains the MPI routines; man/man4 contains the MPE routines, and man/man5 contains the MPID routines (these are for the low-level part of the mpich implementation, are not of interest to users). The command mpich/bin/mpiman is a script that can present the manual pages for mpich in various forms, using either the terminal-style man,xman, or one of several HTML browsers.
Users often prefer working from example Makefiles and programs. The directory that is installed in the examples directory contains a C and Fortran version of the `pi' program, along with a Makefile.in. Other examples there include a simple parallel I/O program and an MPI program written using the C++ bindings for the MPI functions. Users may be interested in some of the examples that are in the source tree, also in the examples directory.