A scripting and command-line front-end is provided by 'r' (aka 'littler')
as a lightweight binary wrapper around the GNU R language and environment
for statistical computing and graphics. While R can be used in batch
mode, the r binary adds full support for both 'shebang'-style scripting
(i.e. using a hash-mark-exclamation-path expression as the first line in
scripts) as well as command-line use in standard Unix pipelines. In other
words, r provides the R language without the environment.
