diff --git a/README.md b/README.md
index a2d5d89..3c0aea5 100644
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+++ b/README.md
@@ -3,6 +3,8 @@
 Play With Docker gives you the experience of having a free Alpine Linux Virtual Machine in the cloud
 where you can build and run Docker containers and even create clusters with Docker features like Swarm Mode.
 
+Under the hood DIND or Docker-in-Docker is used to give the effect of multiple VMs/PCs.
+
 A live version is available at: http://play-with-docker.com/
 
 ## Installation