lel version.
    </p>

    <p>
      <a href = "../../f77_src/poisson_serial/poisson_serial.html">
      POISSON_SERIAL</a>,
      a FORTRAN77 program which
      computes an approximate solution to the Poisson equation in a rectangle,
      and is intended as the starting point for the creation of a parallel version.
    </p>

    <p>
      <a href = "../../f77_src/prime_mpi/prime_mpi.html">
      PRIME_MPI</a>,
      a FORTRAN77 program which
      counts the number of primes between 1 and N, using MPI fo