CD

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CD

  1. 1. Compact Disc (CD) Wang shih ting
  2. 2. Internet <ul><li>A global data communications system. </li></ul><ul><li>A hardware and software infrastructure that provides connectivity </li></ul><ul><li>between computers. </li></ul>
  3. 3. Web <ul><li>One of the services communicated via the Internet. </li></ul><ul><li>A collection of interconnected documents and otherresources, </li></ul><ul><li>linked by hyperlinks </li></ul><ul><li>and URLs . </li></ul>
  4. 4. When you find the information <ul><li>Watch it . </li></ul><ul><li>Save it . </li></ul><ul><li>( Disk 、 Flash Memory 、 </li></ul><ul><li>Tape 、 Floppy Disk 、 </li></ul><ul><li>DVD . . . ) </li></ul><ul><li> Use CD to save . </li></ul>
  5. 5. Compact Disk <ul><li>A n optical disc used to store digital data . </li></ul><ul><li>O riginally  developed to store sound </li></ul><ul><li>recordings </li></ul><ul><li>L ater  allowed the preservation of other </li></ul><ul><li>types of data. </li></ul>
  6. 6. Compact Disk <ul><li>a spin-off of the Laserdisc technology. </li></ul>
  7. 7. Compact Disk <ul><li>Standard CDs have a diameter of 120 mm and can hold up to 80 minutes of uncompressed audio (700 MB of data). </li></ul>
  8. 8. Compact Disk <ul><li>The readable surface of a Compact Disc includes a spiral track wound tightly enough to cause light to diffract into a full visible spectrum </li></ul>
  9. 9. NOW <ul><li>CD not only use on music ,but also use on data. </li></ul><ul><li>Become more useful today. </li></ul>
  10. 10. The end <ul><li>Thank you for your listen. </li></ul>

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