[EngEng]

I was hear that the glass for the forward windowpane in the car and the glass for the sides windowpane are manufactures in different way, every glass is compose from 3 parts but they do it in a different way with different part so when an object will through to the forward windowpane in the car so it will not broke and it will become elastic but when an object will through to the one of the sides windowpane in the car so the windowpane will broke for very small pieces and because of this the person that is setting in the car will not injury.
Now I search after more information about this and also information about other materials and manufactures that are using in cars.

[Enthalpy]

http://en.wikipedia.org/wiki/Laminated_glass
http://en.wikipedia.org/wiki/Windshield