In MS-DOS version 6.0 also includes a utility that can create a more efficient placement file with the name DoubleSpace. However, a company that has a patent on it has become so angry that requires Microsoft to the green table. Microsoft was beaten and deprived of any utility DOS DoubleSpace 6:20. Late in 1994, Microsoft revised the DOS 6:20 with a similar utility but does not violate the patents of others with a DriveSpace. MS-DOS is MS-DOS version of 6:22.