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About CBL Files

A .cbl file is a plain-text file that stores source code written in the COBOL programming language. CBL files typically contain code that processes data, performs calculations, manages records, generates reports, or carries out other business-related tasks. They may include program sections, data definitions, procedures, and other COBOL statements, and the exact contents and formatting can vary depending on the COBOL compiler and the type of application for which the file was created.

COBOL was introduced in the late 1950s and became widely used for business, financial, government, and other data-processing applications, particularly on mainframe and other enterprise computer systems. Organizations have used CBL files to develop and maintain programs that handle tasks such as payroll, accounting, banking transactions, inventory, and record management.

Today, you may encounter CBL files when maintaining legacy business software, working with mainframe applications, studying older source code, or developing programs with a modern COBOL compiler. You can open and view the contents of a .cbl file with a source code editor or plain text editor because it is stored as readable text. However, to compile and run the code, you generally need a compatible COBOL compiler or development environment.