diff --git a/README.md b/README.md
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 # S4-P3-Projet
 PCB maker project
 
-[![Build Status](https://travis-ci.org/marc4492/S4-P3-Projet.svg?branch=master)](https://travis-ci.org/marc4492/S4-P3-Projet)
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+[![Build Status](https://travis-ci.org/marc4492/S4-P3-Projet.svg?branch=master)](https://travis-ci.org/marc4492/S4-P3-Projet)
+
+This is a PCB maker device, it is use to create PCB from an image in black and white. Three software are include in this repo : 
+  - GCode Generator :
+      Create a GCode file form an image of the PCB
+  - Device communication :
+      Send a GCode file to the device
+      Manual control of the device
+  - GCode Interpreter :
+      Move motors from a GCode command
+
+For more documentation on each software read the README files in every directory.