The IBM AS/400, now known as IBM i, is a midrange computer system introduced by IBM in 1988. It is designed for small to medium-sized businesses and is known for its reliability, scalability, and integrated database capabilities. The system runs on the IBM i operating system, which supports various programming languages and applications. The AS/400 features a unique architecture that combines hardware and software, allowing for efficient processing and management of business applications. It is widely used for enterprise resource planning (ERP) and customer relationship management (CRM) systems, making it a popular choice for organizations looking to streamline their operations.