diff --git a/README.md b/README.md
index 1d005b3..5369275 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,9 @@ imitate your arm motions. For more details, read our
 Our package relies on the NAO being reachable from the computer and the
 environment variable `NAO_IP` being set to the IP address of the NAO.
 
+Our main code is written in Python and located in `script/` with the ArUco
+detection and rviz GUI logic in C++ in `src/`.
+
 ## Requirements
 
 * ROS Indigo on Ubuntu 14.04