Disk

There are many forms of data storage, such as BIOS chips and, temporarily, RAM chips but the most common form of so-called "permanent storage" is the disk which, itself, comes in many forms.

Common examples of disks include:

Magnetic disks

• Floppy disks
• Hard disks (grouped by their bus system: usb disks, (S)ATA disks, scsi/SAS disks)

Optical disks

• CD-ROMs
• DVD

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