PL/I (Programming Language One) is a powerful, high-level procedural programming language developed by IBM in the 1960s for scientific, engineering, and business applications. It is known for being a flexible, free-form language that combines features from FORTRAN (scientific) and COBOL (business), supporting structured programming, pointer manipulation, and exception handling.
IBM Developer for z/OS (IDz), is an Eclipse-based integrated development environment (IDE) used for creating and maintaining mainframe applications. It facilitates modern DevOps practices for languages like COBOL, PL/I, and Java. Alternatively, it refers to Industrial Development Zones in economic contexts.
COBOL (Common Business-Oriented Language) is a high-level, English-like programming language developed in 1959 for business data processing. Designed for readability and maintainability, it is a procedural, compiled language still widely used today in mainframe systems for large-scale, transaction-heavy operations in finance, government, and industry.