COBOL for VM

The architecture of COBOL for VM is centered around the z/VM operating system, the COBOL compiler, and the Language Environment (LE) runtime libraries. The COBOL compiler translates COBOL source code into object code, which is then linked and executed within the z/VM environment. The main components include the COBOL compiler itself, the z/VM operating system, and the Language Environment runtime.

Communication between these components occurs through system calls and the z/VM control program. The compiler utilizes the z/VM file system for input and output operations. The Language Environment provides runtime services such as memory management, error handling, and I/O operations.

The compiler does not directly use any databases or storage mechanisms, but COBOL programs compiled with the compiler can interact with databases through standard COBOL features. Network requirements are handled by the z/VM operating system and the COBOL program's network interactions. The compiler supports the ANSI 1985 COBOL standard.

The compiler generates listings and object files. The `RUN` command executes compiled programs.