Hrvoje Niksic <hniksic(a)srce.hr&gt; writes: ... Just how far back do we need to go? C-h v emacs-major-version `emacs-major-version' is a simple built-in variable. Value: 21 Documentation: Major version number of this version of Emacs, as an integer. Warning: this variable did not exist in Emacs versions earlier than: FSF Emacs: 19.23 XEmacs: 19.10 There was no XEmacs 19.10, 19.10 was the final release of Lucid Emacs. Emacs 19.23 (released May 17, 1994) wasn't considered an official release according to the history section of the internals manual. Lucid Emacs 19.10 was released on May 27, 1994. ... That would be good.