Introduction: dClass is a program that overwrites all of the information on a computer disk formatted for the Macintosh Operating system. Media on both floppies and hard drives can be purged by dClass. Once the dClass overwriting process is complete, it is impossible to retrieve the original information with either special hardware or software. For convenience, dClass also formats and verifies the disk and puts an empty directory on the disk so that it can be reused for other work.
