The Minecraft PC version was the first version to be relased. It was released at Minecon 2011.
The Minecraft XBox version was released after PC and it played like in Minecraft PC ALPHA.
The Minecraft Pocket Edition came out on IOS and Andriod and is for Minecraft on the IPod Or Android.
The Minecraft PI version was released at Minecon 2012 and named Minecraft PI for the Rasberry PI.