RPG
RPG (Report Program Generator) is a high-level programming language primarily used for business applications on IBM midrange systems like the IBM i (formerly AS/400). It is designed for generating reports, handling database operations, and processing business logic with a focus on ease of use for commercial data processing. The language has evolved from its original fixed-format versions to modern free-format RPG IV (ILE RPG), supporting structured programming and integration with other technologies.
Developers should learn RPG when working with legacy or current IBM i systems in industries like finance, manufacturing, and logistics, where it is widely used for mission-critical applications. It is essential for maintaining and modernizing existing RPG-based software, as well as developing new business applications that require robust database handling and report generation on IBM platforms. Knowledge of RPG is valuable for roles involving enterprise resource planning (ERP) systems and IBM i administration.