I am new to Android Programming. I am using Eclipse as the IDE for development. I have started a new project and some jar files were automatically added to the project. Could you explain what each of these jar files mean?

* Android 4.4.2
	+ android.jar
* Android Private Libraries
	+ android-support-v7-appcompat.jar
	+ android-support-v4.jar
* Android Dependencies
	+ appcompat\_v7\_2.jar
* libs
	+ android-support-v4.jar

Also, apart from these, there is a folder generated named "appcompat\_v7\_2" which can be seen in the Project Explorer. It also contains Android Private Libraries and libs folder. 

I feel that there is some sort of redundancy involved here. Do clear the confusion.