DVD
DVD is similar to a CD in that it is an optical device and that a laser is used to store the data and read the data. A single sided DVD can store about 4.7 GB of data. DVDs which store data on both sides can hold over 9 GB of data. One problem with the DVD is that the different companies which make them haven't agreed on a standard format. Because of this, you will see various kinds of DVD disks for sale: DVD-R, DVD+R, DVD-RW and DVD+RW.
Advantages
Very large storage capacity
Sound and picture quality is excellent, making them ideal for storing films with video and sound.
DVDs are now mass produced so they are relatively cheap
DVD players can read CDs
Disadvantages
DVDs do not work in CD drives
There is no single standard of DVD
They can be easily damaged by breaking or scratching
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Tue Feb 24, 2015 6:00 am by Shaheer
