@c This is part of the Emacs manual.
@c Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1997, 2001, 2002,
-@c 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+@c 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.
@node Glossary, Key Index, Intro, Top
@unnumbered Glossary
@kbd{Hyper-} (usually written @kbd{H-} for short). @xref{User Input,
Hyper}.
+@item Iff
+``Iff'' means ``if and only if.'' This terminology comes from
+mathematics.
+
@item Inbox
An inbox is a file in which mail is delivered by the operating system.
Rmail transfers mail from inboxes to Rmail files (q.v.@:) in which the