diff --git a/en_US.ISO8859-1/articles/formatting-media/article.sgml b/en_US.ISO8859-1/articles/formatting-media/article.sgml
index 9264687fc9..245017d29f 100644
--- a/en_US.ISO8859-1/articles/formatting-media/article.sgml
+++ b/en_US.ISO8859-1/articles/formatting-media/article.sgml
@@ -116,12 +116,16 @@ now. -->
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-	  <para>disk:   A circular disc,  covered with magnetic or
-	    similarly manipulable material, spun by a motor under a
-	    head.  Data is stored on the disk by changing the pattern
-	    of magnetism on the disc, which can be later read.  Hard
-	    disks, CDROMs, Magneto-optical,and Zip/Jaz removables are
-	    examples of disks.</para>
+	  <para>disk: Hard disks, CDROMs, magneto-optical devices and
+	    Zip/Jazz removable media are example of storage devices
+	    commonly used today.  The basic principle of the way these
+	    work is that one or more spinning disks spin by a motor,
+	    while a head, moving on a radial path close to the disks,
+	    reads from or writes data to the disk.  Writing is done by
+	    modifying some physical properties of the disk (magnetic
+	    flow, reflectivity, etc.) while reading is done by
+	    <quote>detecting</quote> changes to the same physical
+	    properties of the disk.</para>
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