A rugged computer is designed to operate reliably in harsh environments like vibrations, extreme temperatures, and dusty or wet conditions. They have protective casing that allows them to last a long time, even after internal components stop working. Rugged computers are built with the fastest available processors and maximum RAM in order to ensure they remain useful for as long as possible, especially for military applications. Their protective casings are also very expensive, so the goal is for the entire computer to have a long lifespan before requiring repairs.