The first DVD standard is widely used to video store just. Therefore, it is digital video acronym decrypted disk. Later, when DVD starts to become popular store all types of data, another meaning, introduces the DVD acronym digital versatile disc, still use situation.

Generally speaking, the DVD is a new generation of CD. First of all, DVD with its remarkable different larger capacity. On the CD can only contain between 650 and 800 before, the DVD is able to hold any between 1 and 17 byte, according to disk type. The storage of the increase is achieved by reducing laser wavelength. But DVD ability would never reach the 4.7 or more bytes if it is not possible to make DVD disk double or double-sided.
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