/ml       Treats all symbol as case-sensitive

          The /ml option tells Turbo Assembler to treat all symbol names
          as case-sensitive.

          Normally, uppercase and lowercase letters are considered
          equivalent so that the names ABCxyz, abcxyz, and ABCXYZ would
          all refer to the same symbol. If you specify the /ml option,
          these three symbols will be treated as distinct.

          Even when you specify /ml, you can still enter any assembler
          keyword in uppercase or lowercase. Keywords are the symbols
          built into the assembler that have special meanings, such as
          instruction mnemonics, directives, and operators.