In the minutiae of computing jargon there exists a distinction between what is called a `disk' and what is called a `disc'.
Simply put, disks are any storage media which utilize electromagnetic platters to store data. They are susceptible to data loss when placed near magnets, and comprise the following family of storage media:
Discs are storage media which use the patterns of light bouncing off a pitted surface to store data. They comprise the following family of media: