A Single-Board Computer (SBC) is a complete computer built on a single circuit board. It includes essential components like the processor, memory, and input/output interfaces. SBCs are compact and energy-efficient, making them ideal for various applications, from educational projects to industrial automation. Popular examples include the Raspberry Pi and Arduino, which are widely used by hobbyists and professionals alike. These small computers can run operating systems and perform tasks similar to traditional PCs. They are often used in robotics, home automation, and even as media centers. With their affordability and versatility, SBCs have become a favorite among tech enthusiasts and developers.