Get to know the Raspberry Pi.
The Raspberry Pi is a British built low cost computer that enables everybody to learn computing, start programming and explore basic electronics. It's the size of a credit card but capable of running a full operating system and doing everything a desktop does. More importantly, with the Raspberry Pi you install your own operating system, connect all yourdevices and create your own programs using languages like Scratch and Python. There's no case so you can hook up electronic circuits to the pins and control them to get input and output, so you can hack together electronic projects at home.
Setting up a Raspberry Pi is pretty simple, and throughout this book we'll take you step-by-step From unboxing your Raspberry Pi to setting it up and getting started. There are many different models of Raspberry Pi available and each has slightly different features. The fundamentals of each Raspberry Pi are similar though. Each model is a lightweight computer on a single board that's roughly the size of a credit card. Each Raspberry Pi board features a processor made by ARM, which is similar to the models you find in a mobile phone. The ARM processor is fast and lightweight but it runs a different set of software than you might be used to. There are many different operating systems (OS) available, but for most of this book we'll focus on one called Raspbian Jessie with Pixel, which is the OS recommended by the Raspberry Pi Foundation.