The Raspberry Pi 400 is an all-in-one desktop computer designed for education, programming, and general-purpose computing. It integrates a quad-core ARM-based processor into a compact keyboard form factor with a UK keyboard layout. The system delivers stable performance, supports standard Raspberry Pi OS software, and ensures reliable operation for continuous use. Its integrated design improves durability and reduces external cabling requirements. Suitable for computer science education, embedded systems development, and lightweight desktop applications.