diff -r bfbf70c8a2fa -r 6d41445d3f6e data/dictionary.xml
--- a/data/dictionary.xml	Fri Aug 16 22:38:39 2013 +0200
+++ b/data/dictionary.xml	Fri Aug 16 22:43:59 2013 +0200
@@ -392,7 +392,7 @@
 		<explanation language="en">
 			<text>
 				an multibyte but fixed-length (2 byte) character encoding;
-				sometimes is used for SMS;
+				sometimes is used for SMS when international characters are needed – such single message has only 70 characters instead of 160 (7-bit encoding);
 				for general use it was superseded by UTF-16 (in Unicode 2.0 in 1996)
 			</text>
 		</explanation>