CDs and DVDs are everywhere these days. Whether they are used to hold music, data or computer software, they have become the standard medium for distributing large quantities of information in a reliable package. Compact discs are so easy and cheap to produce that America Online sent out millions of them every year to entice new users. And if you have a computer and CD-R drive, you can create your own CDs, including any information you want. The first CD of general interest was Grolier’s Electronic Encyclopedia.
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