MASM 6.0 provides a new command-line driver, ML, which is more powerful and flexible than the previous driver (MASM). ML assembles and links with one command. The old MASM driver command syntax is still supported, however, to support existing batch files and makefiles that use MASM command lines.
NOTE :
The name MASM has traditionally been used to refer to the Microsoft Macro Assembler. It is used in that context throughout this book. But MASM also refers to MASM.EXE, which has been replaced by ML.EXE. In MASM 6.0, the MASM.EXE file is a small utility that translates command-line options to those accepted by ML.EXE, and then calls ML.EXE. The distinction between ML.EXE and MASM.EXE is made whenever necessary. Otherwise, MASM refers to the assembler and its features.