4 ms·

DriveSpace. And yes, something similar to Windows 3.1 standard mode was used for both, often called mini-Windows.

• jboles 9y ago
  If I remember correctly it was called DoubleSpace in Windows 3.1/DOS 6.2 and then due to some patent or licencing issue was renamed (and the compression algorithm modified) to DriveSpace in Windows for Workgroups 3.11/DOS 6.22.
  • yuhong 9y ago
    AFAIK it is part of DOS not Windows.