Combo drive
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A Combo drive is a type of optical drive that combines CD-R/CD-RW recording capability with the ability to read (but not write) DVD media. The term was popularized by Apple Computer as a name for the low-end substitute for their high-end SuperDrive, which was designed to both read and write DVD and DVD recordable media. The device was created as a mid-range option between a CD burner and a DVD burner, which at the time the combo drive was introduced was generally an expensive option costing in excess of US$300 a unit.
Combo drives are becoming less and less common on new systems, though they do occasionally appear in lieu of CD-only drives on low-end computers to lower production and sale costs.