Data security is of paramount concern to any organization, whether it be sensitive personal information, in the case of a hospital's patient records, or proprietary corporate information, such as R&D or new product data.
When you dispose of an old computer, you need to ensure that this data is properly deleted, so it can't be retrieved by someone who obtains the computer from the garbage, storage facility, or even used computer store.
Deleting files off the hard drive is not enough. Even formatting the drive isn't totally secure. With special forensic software, a third party could rebuild the data from your hard drive, enabling them to find all the information you thought you had deleted.
Some businesses will solve this problem by drilling holes through the hard drive of the computer, or destroying it with a hammer. While this is effective, albeit in a crude way, it isn't very environmentally friendly, as the drive, and usually the entire computer, inevitably ends up in a landfill somewhere.
Using special software, we can delete an individual file, a partition, or an entire drive, wiping it completely clean of all data, well beyond the ability of any forensics tools to be able to recover it. This is done without any physical damage to the hard drive, and, as such, the drive, or the whole computer, may be sold or reused, without any fear of sensitive data falling into the wrong hands.