Most correct COBOL programs will compile and execute without changes and produce the same results “Old” and “new” code can be mixed within an application and communicate with static, dynamic and DLL calls No need to recompile entire applications to take advantage of new V5 features.Provide Source and binary compatibility.Introduction to COBOL programming on Z/OS, COBOL Coding sheet, COBOL Language structure, Different kinds of Data items including numerically edited data item.IBM Cobol compiler is a licensed and rebranded OEM of Microsoft Cobol.

When NUMPROC(MIG) is in effect, the compiler generates code that is similar to that produced by OS/VS COBOL.