From: Richard M. Stallman <rms@gnu.org>
Date: Thu, 12 Apr 2007 21:40:55 +0000 (+0000)
Subject: (Glossary): Explain `iff'.
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(Glossary): Explain `iff'.
---

diff --git a/man/glossary.texi b/man/glossary.texi
index 2a55b49645b..d082e6ec077 100644
--- a/man/glossary.texi
+++ b/man/glossary.texi
@@ -601,6 +601,10 @@ have.  To make a character Hyper, type it while holding down the
 @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