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Transcript

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