Optical Disk Recorder (Optical Disks) - These devices record data onto disks using optical techniques for recording and replay. These disks offer large storage capacities on a small area, the most common being the popular 5¼ inch compact disk (CD.)
3 popular types of optical disks are:
* CD-ROM (CD) - Like audio CDs, CD-ROMs can come with data already encoded onto them. The data is permanent and can be read any number of times, but CD-ROMs cannot be modified.
* WORM : Stands for Write-Once, Read-Many. With a WORM disk drive, you can write data onto a WORM disk, but only once. After that, the WORM disk behaves like a CD-ROM.
* Erasable: Optical disks that can be erased and loaded with new data, just like magnetic disks. These are often referred to as "EO" (Erasable Optical) disks.