This book introduces ASM86, Intel's 8086/8088 assembly language. It describes the makeup of an ASM86 source file and then explains a few of the features of the assembly language. ASM86 is the name of Intel's 8086/8088 assembly language. Statements written in this language are used to specify machine instructions for the 8086 or 8088 and to allocate memory space for program data. These human-readable statements are translated into a machine-readable form by a program called the ASM86 assembler. The input to the assembler is a source file containing assembly language statements. The assembler produces two output files: an object file and a listing file . The object file contains the machine-readable translation of the statements in the source file; the listing file shows this machine code in hexadecimal form, along with the ASM86 source statements from which it was produced.