--- a/slides07.tex	Wed Nov 14 08:46:00 2012 +0000
+++ b/slides07.tex	Mon Nov 19 14:18:42 2012 +0000
@@ -359,9 +359,9 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \mode<presentation>{
 \begin{frame}[c]
-\frametitle{\begin{tabular}{c}CFG\end{tabular}}
+\frametitle{\begin{tabular}{c}CFGs\end{tabular}}
 
-A \alert{context-free} grammar \bl{$G$} consists of
+A \alert{context-free} grammar (CFG) \bl{$G$} consists of:
 
 \begin{itemize}
 \item a finite set of nonterminal symbols (upper case)