diff --git a/README.md b/README.md
index c4b4882..10dc728 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 All developers have to use the following version of software
 - Unity 2018.4.3f1 (LTS)
 - Microsoft Visual Studio Commmunity 2017. version 15.9.13
-- Pure Data 0.49.1  64 bit(Install via installer)
+- Pure Data 0.49.1  **64 bit** (Install via installer)
 
 # Recommended IDE
 - rider by jetbrains if available
@@ -21,4 +21,14 @@ After you clone the repo. please execute
 
 This will recursive clone all submodules from the github.
 
+## PdBackend
+
+The unity project contains a pd binary under StreamingAssets folder
+PdBackend.cs monobehaviour automatically launches the Pd process when the game is started.
+To use this Features PdBackend should exist in the scene.
+
+## shmem
+The Unity project access the Arrays in Pd patch via shmem (Shmem) object
+
+