Computer Bytes - No. 20
|
|
|
In the ever changing world of computers, it is not surprising that how we store and manage our data has also changed. Where the floppy disc was once the norm, we now have choices of using CD's, DVD's, jump-drives, and memory sticks. All these choices can be confusing. Today we'll take a look at some of the differences between CD's and DVD's. Both of these discs are considered optical with the primary difference being the amount of data they can hold.
The first CD or Compact Disc for the computer was available to the public in the 1990's. These mass produced discs knows by the acronym CD-R were very affordable but were limited to being 'recordable' only. So that in the case of a CD-R disc - the R stood for Recordable, and in the case of a CD-ROM disc - the ROM stood for Read-Only Memory. Both of these discs can only be written to once and cannot be erased or over-written making them a cost efficient way to store pictures or static data. The next disc produced was identified by the acronym CD-RW with the RW representing ReWritable. This disc can be written to several times. These discs hold the same amount as a CD-R but since they can be re-used repeatedly are more expensive. Discs that are re-writable can also be used for making audios which will play in most CD players. One of the more familiar CD formats is MP3 which contains only digital audio files. Almost all of the computers manufactured today come equipped with a device that will write to discs.
Just as CD's have evolved so have DVD's. There are now over a dozen different formats on the market. Some of the more basic formats offered by DVD's or Digital Versatile Discs formerly referred to as Digital Video Discs are Record only, Read/Write and RAM. The RAM disc can be recorded and erased repeatedly but is compatible only with devices from companies that support this format. DVD's created by a +R/+RW device can be read by most commercial players. If you are uncertain about which CD or DVD to use, check with your retailer before recording anything to make sure you have a compatible disc format.
This is just a small overview of some of the CD/DVD discs available and while it may not be easy to determine which discs will work in your computer, once you get it sorted out you will find that you can store pictures, music, and video on discs freeing up your internal computer space. For more information regarding which discs your computer uses, check your PC Owner's Manual. And, if you plan to buy a new PC, review the specifications closely to avoid future questions regarding which CD's and DVD's to use or ask the retailer-manufacturer for an explanation if you are unable to determine the computer's features. In other words, make sure the computer you are buying will perform the functions you want.
Computer Bytes Index
|
|
|
Send Us an Email | Home Page
Copyright 2007-2008. All rights reserved. Computer Bytes articles may not be reprinted, published, quoted, copied, or used in any manner whatsoever without the expressed written permission of David Moncrief.
|
