5 The ESS environment is built on the open-source projects of
6 many contributors, dating back nearly 15 years.
7 Doug Bates and Ed Kademan wrote S-mode in 1989 to edit S and Splus
8 files in GNU Emacs. Frank Ritter and Mike Meyer added features,
9 creating version 2. Meyer and David Smith made further contributions,
10 creating version 3. For version 4, David Smith provided process
11 interaction based on Olin Shivers' comint package.
13 John Sall wrote GNU Emacs macros for SAS source code around 1990.
14 Tom Cook added more functionality creating SAS-mode which was
15 distributed in 1994. Also in 1994, A.J. Rossini extended S-mode
16 to support XEmacs. Together with extensions written by Martin Maechler,
17 this became version 4.7 and supported S, Splus, and R.
18 In 1995, Rossini extended SAS-mode to work with XEmacs.
20 In 1997, Rossini merged S-mode and SAS-mode into a single Emacs
21 package for statistical programming; the product of this marriage was
26 The multiple process code, and the idea for
27 @code{ess-eval-line-and-next-line} are by Rod Ball.
30 Thanks to Doug Bates for many useful suggestions.
33 Thanks to Martin Maechler for reporting and fixing bugs, providing many
34 useful comments and suggestions, and for maintaining the S-mode mailing
38 Thanks to Frank Ritter for updates from the previous version, the menu
39 code, and invaluable comments on the manual.
42 Thanks to Ken'ichi Shibayama for his excellent indenting code, and many
43 comments and suggestions.
46 Last but definitely not least, thanks to the many beta testers of the
47 S-mode and ESS mailing lists.
50 @emph{ESS} version 5 is being developed and currently maintained by