+ TODO: add an example about parallel executions.
+
+@subsection s4u_ex_activity_io I/O (using disks and files)
+
+SimGrid provides two levels of abstraction to interact with the
+simulated storages. At the simplest level, you simply create read and
+write actions on the storage resources.
+
+ - <b>Access to raw storage devices</b>.
+ @ref examples/s4u/io-storage-raw/s4u-io-storage-raw.cpp \n
+ This example illustrates how to simply read and write data on a
+ simulated storage resource.
+
+The FileSystem plugin provides a more detailed view, with the
+classical operations over files: open, move, unlink, and of course
+read and write. The file and disk sizes are also dealt with and can
+result in short reads and short write, as in reality.
+
+ - <b>File Management</b>. @ref examples/s4u/io-file-system/s4u-io-file-system.cpp \n
+ This example illustrates the use of operations on files
+ (read, write, seek, tell, unlink, ...).
+
+ - <b>Remote I/O</b>.
+ @ref examples/s4u/io-file-remote/s4u-io-file-remote.cpp \n
+ I/O operations on files can also be done in a remote fashion,
+ i.e. when the accessed disk is not mounted on the caller's host.
+
+@section s4u_ex_actors Acting on Actors
+
+@subsection s4u_ex_actors_start Starting and stoping actors
+
+ - <b>Creating actors</b>.
+ @ref examples/s4u/actor-create/s4u-actor-create.cpp \n
+ Most actors are started from the deployment XML file, but there is other methods.
+ This example show them all.
