Hardware Secrets posted a quick guide about the Centrino platform

Contrary to what a lot of people think, Centrino isn't a laptop processor but a platform containing specific components set by Intel: a given processor, a given chipset and a given wireless network. A laptop can only be called Centrino if it has these three components. In this tutorial we will show you the several Centrino generations and the difference between them. Check it out.

Everything You Need to Know About The Centrino Platform