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Spelling of disc : ウィキペディア英語版 | Spelling of disc
''Disk'' and ''disc'' are the two alternative spellings of the descriptive word for things of a generally thin and circular geometry. These variations are due to the way in which the words originated. A widespread consensus has developed that one spelling should be used for certain senses and the other spelling should be used for the other senses. Generally for disk storage as an electronic medium, disk refers to magnetic storage while disc refers to optical storage. ==Disk== In the world of computer a disk refers to magnetic media, such as a floppy disk, the disk in your computer's hard drive, an external hard drive. Disks are always re-writable unless intentionally locked or write-protected. You can easily partition a disk into several smaller volumes, too. Disks are usually sealed inside a metal or plastic casing (often, a disk and its enclosing mechanism are collectively known as a "hard drive"). The earlier word is ''disk'', which came into the English language in the middle of the 17th century, and (probably following pre-existing words such as ''risk'') it was spelled with a ''k''. In the 19th century, ''disk'' became the conventional spelling for audio recordings made on a flat plate, such as the gramophone record. Early BBC technicians differentiated between ''disks'' (in-house transcription records) and ''discs'' (the colloquial term for commercial gramophone records, or what the BBC dubbed CGRs).
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