R is an open source statistical programming language
similar to S-PLUS.
Sources, binaries and documentation for R can be
obtained via CRAN, the “Comprehensive R Archive
Network” whose current mirrors are listed at
    http://cran.r-project.org/mirrors.html
Available on Unix, Mac and Windows platforms.
We’ll focus on using R in the Windows environment.
Version 2.1.1 on labs and classrooms machines.