is a data storage device used for containing data recorded in digital form. It is a type of storage medium that resulted from audio technology. A standard CD can hold a huge amount of information about 650 Megabytes (MB). This means that a single disk can carry more than an hour of high quality music or an entire feature film. It can store huge amount of text, graphics, audio and video. The most common type of CD, the audio CD, is increasingly popular as a means of providing the consumer with high quality recordings of music. The Compact Disk - Read Only Memory (CD-ROM) is ideal for distributing information such as encyclopedias and other reference materials.
The two types of CDs available are:
• Compact Disc - R (CD-R): Is recordable CDs, called CD-R, which can be written only once and after writing they becomes read-only discs.
• Compact Disk-RW (CD-RW): Can be overwritten repeatedly by a computer. You can erase the previous data and write the new content on the disc.