- GNU Emacs is a member of the Emacs editor family. There are many Emacs
-editors, all sharing common principles of organization. For information on
-the underlying philosophy of Emacs and the lessons learned from its
-development, write for a copy of AI memo 519a, @cite{Emacs, the Extensible,
-Customizable Self-Documenting Display Editor}, to Publications Department,
-Artificial Intelligence Lab, 545 Tech Square, Cambridge, MA 02139, USA@. At
-last report they charge $2.25 per copy. Another useful publication is LCS
-TM-165, @cite{A Cookbook for an Emacs}, by Craig Finseth, available from
-Publications Department, Laboratory for Computer Science, 545 Tech Square,
-Cambridge, MA 02139, USA@. The price today is $3.
-
-This edition of the manual is intended for use with GNU Emacs installed
-on GNU and Unix systems. GNU Emacs can also be used on VMS, MS-DOS
-(also called MS-DOG), Windows NT, and Windows 95 systems. Those systems use
-different file name syntax; in addition, VMS and MS-DOS do not support
-all GNU Emacs features. We don't try to describe VMS usage in this
-manual. @xref{MS-DOS}, for information about using Emacs on MS-DOS.
+ GNU Emacs is a member of the Emacs editor family. There are many
+Emacs editors, all sharing common principles of organization. For
+information on the underlying philosophy of Emacs and the lessons
+learned from its development, see @cite{Emacs, the Extensible,
+Customizable Self-Documenting Display Editor}, available from
+@url{ftp://publications.ai.mit.edu/ai-publications/pdf/AIM-519A.pdf}.
+
+This edition of the manual is intended for use with GNU Emacs
+installed on GNU and Unix systems. GNU Emacs can also be used on VMS,
+MS-DOS (also called MS-DOG), Microsoft Windows, and Macintosh systems.
+Those systems use different file name syntax; in addition, VMS and
+MS-DOS do not support all GNU Emacs features. @xref{Emacs and
+Microsoft Windows}, for information about using Emacs on Windows.
+@xref{Mac OS}, for information about using Emacs on Macintosh. We
+don't try to describe VMS usage in this manual.