A programming language for statistical computing and graphics that is released under the GNU license. R was designed to handle a wide variety of complex statistical tasks, and many user-developed routines are also available. R is the open source version of S, which was developed in the mid-1970s by John Chambers at Bell Labs (S-PLUS was a commercial version from TIBCO Software). For more information, visit www.r-project.org. See
CRAN.