Here are some interesting slides from my presentation, showing a simple program written that calculates PI with great accuracy by performing a simple numerical trapezoidal integration. Most of the other slides in the presentation are borrowed from various web-sites, so I don't feel free to post those:

• The algorithm (slide 1) - Borrowed from Adaptor website
• Serial Fortran 77 (g77 code, slide 1, slide 2)
• MPI parallelized Fortran 77 (g77 MPICH code, Compilation and running, slide 1, slide 2, slide 3, slide 4)
• Open MP parallel Fortran 77 (Sample code, slide 1, slide 2, slide 3)
• HPF-High Performance Fortran (Adaptor HPF code, Compilation and running, slide 1, slide 2, slide 3, slide 4, slide 5)
  
  Here are some other on-line tutorials of interest:
• Parallel Computing:
  http://www.mhpcc.edu/training/workshop/
• OpenMP:
  http://www.openmp.org/presentations/index.cgi?sc98_tutorial
• HPF:
  ftp://ftp.gmd.de/GMD/adaptor/docs/HPF_Students.pdf , http://www.npac.syr.edu/EDUCATION/PUB/hpfe/
• MPI:
  http://www-unix.mcs.anl.gov/mpi/tutorial/

and many others...