## Writing a widget
+### App directory organization
+
+There are few directories that are by default used in the binder. At the root
+directory of the widget folder, here are the directories that could be used:
+
+- *lib* : default directory where lies external libraries needed for
+ the binding. Binding could be stored here too or in another directory of your
+ choice.
+- *htdocs* : root HTTP directory if binding has web UI.
+
### The steps for writing a widget
1. make your application