IBM i
IBM i is an integrated operating system and platform developed by IBM for midrange computers, originally known as AS/400. It combines a robust operating system (OS/400, now IBM i) with a database (Db2 for i), security, and application runtime environments, designed for high reliability and low maintenance. It is widely used in industries like banking, manufacturing, and retail for running critical business applications.
Developers should learn IBM i when working in enterprise environments that rely on legacy or modernized RPG, COBOL, or Java applications on IBM Power Systems. It is essential for maintaining and modernizing existing business-critical systems, particularly in sectors where uptime and data integrity are paramount, such as finance and logistics. Knowledge of IBM i is also valuable for integrating these systems with modern web services and cloud technologies.