It may seem difficult to comprehend but it really is quite simple. 'Centrino' is a marketing term for a type of laptop that promotes wireless network interoperability and long battery life, while 'Core' refers to the processor itself. To earn a Centrino badge, laptops must utilise a specific type of motherboard chipset, a specific type of wireless network card and a processor from the Intel Core range.
Three types of Core processor are commonly used in Centrino laptops: Core Solo, Core Duo and Core 2 Duo. Core Solo CPUs represent the bottom rung -- they come in several guises but each variant is optimised for long battery life rather than raw speed. Laptops using Core Solo CPUs fall under the Centrino brand.
Centrino Duo-branded laptops use Core Duo processors. These are the dual-core alternatives to Core Solo. They typically have higher clock speeds, but more importantly, two cores (essentially twin brains) to share the workload.
Newerwill utilise the Core 2 Duo series of processors. These chips have twice as much Level 2 cache memory for better performance, have optional high-speed 802.11n Wi-Fi access, plus Intel 64 technology, which lets you take advantage of 64-bit operating systems.
You may also spot laptops branded Centrino Pro. These are reserved for business laptops that contain Intel vPro -- a technology that allows IT managers to control, manage and protect laptops whether they're on, off, broken or fully operational.