Tutoring English, different versions of familiar words are interesting. The tutor shares a find.
In the context of computers, I recall reading disk. “Is it disc?” I would often wonder. Today the matter surfaced, so I looked it up. I got two points of view:
Disk is particularly used in the context of computers, such as hard disk drive (hdd). Disc can be used that way as well, but is the proper way to refer to disc brakes, flying disc, disc jockey, etc.
Disk and disc are interchangeable. Disk jockey is valid.
Collins Essential Canadian English Dictionary and Thesaurus. Glasgow: HarperCollins Publishers, 2006.
Merriam-Webster Dictionary. Springfield: Merriam-Webster, 2004.
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.