COBOL for the 21st Century 11th Edition: A Modern Guide for the Digital Age

1. Procedural programming: COBOL uses a procedural programming paradigm, which focuses on procedures and steps to achieve a goal.
2. Variables and data types: COBOL supports various data types, including numeric, alphanumeric, and date/time types.
3. File handling: COBOL provides built-in support for file handling, including sequential, indexed, and relative files.

This angle focuses on how COBOL isn't just "old code"—it's the actual plumbing of the global economy.