A disc which although the same size as a CD can hold many times the amount of data due to a combination of more sophisticated data compression systems, the ability to store and retrieve data from different levels of the disc. This means that moving images can be stored in a way which is more permanent than tape and maintains its quality over time, whereas tape particles lose their magne- tism and lose details. Research is going on to more than double the storage capacity of the current DVD’s by using different laser technologies. The “versatility” referred to in the name means that the equipment incorporates technical standards which means that digital information relating to images static or moving sounds or text can be stored and retrieved.
