Although disc and disk are listed as variants for something round and flat in shape, each one seems to have a preferred usage. Disc is seen more often in the music industry and throwable objects such as Frisbees, whereas disk is the preferred spelling in computer-related lingo such as floppy disk.

Discing is a common farming practice that involves using a disk harrow or a set of disks attached to a tractor to break up and loosen the soil. The disks are designed to cut into the soil and break up any compacted areas, creating a more aerated and porous soil structure.

Quick summary. Disc and disk can be and are used interchangeably in many contexts, though disk may be slightly more common. The D in CD and DJ (usually) stands for disc, which is the spelling also used in disc golf. The spelling disk is usually used in the context of computer storage in terms like disk drive, floppy disk, and hard disk.

Discing is when you use a disc harrow, which is a type of cultivator with two rows of vertical dishes, to cut up and bury organic matter on the surface of the soil. Typically, you would disc a field after plowing it to smooth out the surface.

Websters Dictionary says both are correct. "disc" and "disk" have exact same definition. Only way it matters is when it becomes an adjective. (ie. disCing) In that case, C only. I'm turning in my application for chief of spelling police ASAP!