Add mention of IEC 60908

doc/glossary.texi

@@ -37,10 +37,10 @@ Compact Disc
 
 @item CD-DA
 @cindex CD-DA
-Compact Disc Digital Audio, described in the ``Red Book'' or IEC
-908. This commonly referred to as an audio @acronym{CD} and what most
-people think of when you play a @acronym{CD} as it was the first to
-use the @acronym{CD} medium.
+Compact Disc Digital Audio, described in the ``Red Book'' or IEC 60908
+(formerly IEC 908). This commonly referred to as an audio @acronym{CD}
+and what most people think of when you play a @acronym{CD} as it was
+the first to use the @acronym{CD} medium.
 
 See @url{http://en.wikipedia.org/wiki/Red_Book_(audio_CD_standard)}