The machines, wiring, and other physical components of a computer or other electronic system.
Hardware Problem.
Refers to objects that you can actually touch, like disks, disk drives,display screens, keyboards, printers, boards, and chips. In contrast, software is untouchable. Software exists as ideas, concepts, and symbols, but it has no substance.
Disk Problem..
A round plate on which data can be encoded. There are two basic types of disks: magnetic disks and optical disks.
On magnetic disks, data is encoded as microscopic magnetizedneedles on the disk's surface. You can record and erase data on a magnetic disk any number of times, just as you can with a cassette tape. Magnetic disks come in a number of different forms:
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