Explain the following giving their uses and advantages/disadvantages.
(i) DVD
(ii) Monitor Resolution
(iii) Non-impact printers
(iv) Scan codes
(v) Graphics accelerators
(vi) SCSI
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Blank DVDs are used for backing up computer files and for storing recordable media, whether it is in the form of photos, music or text files. There are several different DVD formats from which to choose. The oldest is DVD-R, introduced in 1997. Other major formats are DVD+R, DVD-RW and DVD+RW and each has something different to offer. Advantages
DVD-R is the most compatible format and can be read by practically all DVD players. They can be read by DVD drives in computers, portable DVDs and home DVD players. They cost a little less than DVD+R, and are significantly cheaper than RW DVDs. The dual layer versions offer almost twice the storage of rewritable discs, which is a further saving of both money per disc and the number of discs required.
DVD-R is the most compatible format and can be read by practically all DVD players. They can be read by DVD drives in computers, portable DVDs and home DVD players. They cost a little less than DVD+R, and are significantly cheaper than RW DVDs. The dual layer versions offer almost twice the storage of rewritable discs, which is a further saving of both money per disc and the number of discs required.
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