The output from the assembler can consist of an object module, a program listing, terminal messages, and an associated data file. The object module can be written to a data set residing on a direct-access device or a magnetic tape. From that file, the object module can be read and processed by the linkage editor or the loader. See Object deck output for the format of the object module.

The program listing lists all the statements in the module, both in source and machine language format, and gives other important information about the assembly, such as error messages. The listing is described in detail in Using the assembler listing.