The Raspberry Pi might sound like dessert, but it's actually a credit card–sized computer changing the world of DIY tech. First launched in 2012 by the Raspberry Pi Foundation, it was designed to make computing affordable and accessible for everyone. Since then, it's evolved into one of the most versatile tools in modern technology, powering everything from classroom lessons to smart home automation. For as little as $50, you get a device that consumes less than 27 watts of power, making it remarkably cost-efficient compared to full-size computers.