diff --git a/en_US.ISO8859-1/books/handbook/serialcomms/chapter.sgml b/en_US.ISO8859-1/books/handbook/serialcomms/chapter.sgml
index 05e5a87efd..024f9d4730 100644
--- a/en_US.ISO8859-1/books/handbook/serialcomms/chapter.sgml
+++ b/en_US.ISO8859-1/books/handbook/serialcomms/chapter.sgml
@@ -756,7 +756,7 @@ sio3: type 16550A</screen>
 
 	<screen>&prompt.root; <userinput>cu -l <replaceable>serial-port-device</replaceable></userinput></screen>
 
-	<para>Where <quote>serial-port-device</quote> is the name a
+	<para>Where <quote>serial-port-device</quote> is the name of a
 	  special device file denoting a serial port of your system.
 	  These device files are called
 	  <devicename>/dev/cuaa<replaceable>N</replaceable></devicename>
@@ -769,8 +769,8 @@ sio3: type 16550A</screen>
 
 	<note>
 	  <para>Note that device numbers in &os; start from zero and not
-	    one (like they do, for instance in DOS-derived systems).
-	    This means that what DOS-based systems
+	    one (like they do, for instance in &msdos;-derived systems).
+	    This means that what &msdos;-based systems
 	    call <quote>COM1</quote> is
 	    usually <filename>/dev/cuad0</filename> in &os;.</para>
 	</note>