Double density disc : A floppy disc which can store twice as much information as its single density counter part.

雙倍密度磁碟：能貯存雙倍數(shù)據(jù)的軟磁碟非常黄的网站。

Flippy disc(Flippy-Floppy): The early form of a double- sided floppy disc.

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To copy data onto a mass storage device such as a disc in protection against loss or damage ; to copy from the hard drive onto a floppy disc or CD-ROM .

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"A typical PC assemblage comprise s a CPU; internal memory consisting of RAM and ROM; data storage devices (including a hard disc, a floppy disc, or CD-ROM); and input/output devices (including a display screen, keyboard, mouse, and printer)."

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Hard disk read operation, the disc changes in the magnetic field affects the head of the resistance value, the process will not heat the disc, head to change it because the current, so that the heat will be generated.

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