Processing involves the translation of source statements into machine language, assignment of storage locations to instructions and other elements of the program, and performance of auxiliary assembler functions you have designated. The output of the assembler program is the object program, a machine language translation of the source program. The assembler produces a printed listing of the source statements and object program statements and additional information, such as error messages, that are useful in analyzing the program. The object program is in the format required by the binder.