This web page accompanies a talk having the same title as this web page given in the School of Statistics, September 16, 2010. Here are the slides for that talk. And here are some complete R examples from which the example snippets in that talk were taken.

R batch file R output file what it is
bar.R bar.Rout multicore example without random numbers
foo.R foo.Rout multicore example with random numbers
snow.R snow.Rout snow example without random numbers
snowtoo.R snowtoo.Rout snow example with random numbers