The Raspberry Pi is a credit-card sized computer that can plug into a TV and keyboard to function like a desktop computer. It was developed by the Raspberry Pi Foundation to improve computer science education and is inexpensive at $25-35. The Raspberry Pi runs Linux and uses an ARM processor, has ports for HDMI, USB, Ethernet, and an SD card for storage. It can be used for programming, robotics projects, and functions as a basic computer.