S-PLUS (Insightful)

The S language, developed at Bell Labs, is widely used in the statistical community. This version of S is marketed by Insightful and it offers all the usual statistical functions (and then some with 4,200 functions). One can import data from many different sources, including SAS and Excel. Among its rather unique features are its object-oriented language (so data and procedures are more closely tied together, which can speed analysis) and "data visualization and exploration" which offers "exceptional graphing capabilities." Insightful is the sole licensee of S.

A derivative of S, called R , is now being developed. That software is freely available.