http://www.r-project.org/

= Introduction =
R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R.
R 是一種用在統計計算及繪圖的語言及環境，它是 GNU project，且非常類似 S 語言，它由 Bell Laboratories 開發。