diff --git a/Doc/libwww.tex b/Doc/libwww.tex
index 5cd4c05..9e09aa1 100644
--- a/Doc/libwww.tex
+++ b/Doc/libwww.tex
@@ -11,6 +11,10 @@
 
 \begin{description}
 
+\item[cgi]
+--- Common Gateway Interface, used to interpret forms in server-side
+scripts.
+
 \item[urllib]
 --- Open an arbitrary object given by URL (requires sockets).