diff --git a/include/SFML/Audio.hpp b/include/SFML/Audio.hpp
index 9f405b72..36c860f3 100644
--- a/include/SFML/Audio.hpp
+++ b/include/SFML/Audio.hpp
@@ -43,5 +43,8 @@
 
 ////////////////////////////////////////////////////////////
 /// \defgroup audio Audio module
+///
+/// Sounds, streaming (musics or custom sources), recording,
+/// spatialization.
 /// 
 ////////////////////////////////////////////////////////////
diff --git a/include/SFML/Graphics.hpp b/include/SFML/Graphics.hpp
index 89354e12..61c543b3 100644
--- a/include/SFML/Graphics.hpp
+++ b/include/SFML/Graphics.hpp
@@ -56,5 +56,7 @@
 
 ////////////////////////////////////////////////////////////
 /// \defgroup graphics Graphics module
-/// 
+///
+/// 2D graphics module: sprites, text, shapes, ...
+///
 ////////////////////////////////////////////////////////////
diff --git a/include/SFML/Network.hpp b/include/SFML/Network.hpp
index ef1b78ad..d2b32bd0 100644
--- a/include/SFML/Network.hpp
+++ b/include/SFML/Network.hpp
@@ -44,5 +44,8 @@
 
 ////////////////////////////////////////////////////////////
 /// \defgroup network Network module
-/// 
+///
+/// Socket-based communication, utilities and higher-level
+/// network protocols (HTTP, FTP).
+///
 ////////////////////////////////////////////////////////////
diff --git a/include/SFML/System.hpp b/include/SFML/System.hpp
index 9968c995..fd333b99 100644
--- a/include/SFML/System.hpp
+++ b/include/SFML/System.hpp
@@ -48,5 +48,9 @@
 
 ////////////////////////////////////////////////////////////
 /// \defgroup system System module
+///
+/// Base module of SFML, defining various utilities. It provides
+/// vector classes, unicode strings and conversion functions,
+/// threads and mutexes, timing classes.
 /// 
 ////////////////////////////////////////////////////////////
diff --git a/include/SFML/Window.hpp b/include/SFML/Window.hpp
index 03856fcf..1f3d27ee 100644
--- a/include/SFML/Window.hpp
+++ b/include/SFML/Window.hpp
@@ -45,5 +45,8 @@
 
 ////////////////////////////////////////////////////////////
 /// \defgroup window Window module
-/// 
+///
+/// Provides OpenGL-based windows, and abstractions for
+/// events and input handling.
+///
 ////////////////////////////////////////////////////////////