ACUCOBOL-GT uses Acu4GLĀ® libraries to access information stored in relational database management systems (RDBMSs). Data dictionaries generated by the compiler guide the libraries in mapping the field names and data types that are passed between COBOL and the database engine.

The essence of Acu4GL libraries is that standard COBOL I/O statements are used to access databases.

Acu4GL dynamically generates industry-standard SQL from the COBOL I/O statements. As the ACUCOBOL-GT runtime module is executing your COBOL application, Acu4GL is running behind the scenes to match up the requirements and rules of both COBOL and the RDBMS to accomplish the task set by your application.