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Computer Data Representation

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How data is represented within a computer, for students at the HS level..

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Computer Data Representation

  1. 1. Computer – Data Representation Rita Ester
  2. 2. Bit <ul><li>Binary digit </li></ul><ul><li>Smallest unit of information the computer uses </li></ul><ul><li>Electronic signal </li></ul><ul><ul><li>on (1) </li></ul></ul><ul><ul><li>off (0) </li></ul></ul><ul><li>Video Source: Intel Innovation in Education: The Journey Inside: Digital Information Lesson 2: A Bit of This and That, http://educate.intel.com/discover/JourneyInside/TJI_DigitalInfo_lesson2/default.aspx </li></ul>
  3. 3. Byte <ul><li>Group of 8 bits. </li></ul>
  4. 4. More than One Byte <ul><li>KB </li></ul><ul><ul><li>Kilobyte </li></ul></ul><ul><ul><li>about one thousand bytes </li></ul></ul><ul><ul><li>1024 (=2 10 ) bytes. </li></ul></ul><ul><li>MB </li></ul><ul><ul><li>Megabyte </li></ul></ul><ul><ul><li>about a million bytes, </li></ul></ul><ul><ul><li>1,048,576 (=2 20 ) bytes. </li></ul></ul><ul><li>GB </li></ul><ul><ul><li>Gigabyte </li></ul></ul><ul><ul><li>about one billion bytes, </li></ul></ul><ul><ul><li>1,073,741,824 (=2 30 ) bytes. </li></ul></ul>
  5. 5. ASCII <ul><li>0/1 code for characters, </li></ul><ul><li>American Standard Code for Information Interchange. </li></ul>
  6. 6. Binary Numbers <ul><li>Numbers in the computer </li></ul><ul><ul><li>represented like this. </li></ul></ul><ul><li>Used by the computer to work with data </li></ul><ul><li>Two values: 1 and 0 </li></ul><ul><li>Video Source: Intel Innovation in Education: The Journey Inside: Digital Information Lesson 4: Binary Numbers, http://educate.intel.com/discover/JourneyInside/TJI_DigitalInfo_lesson4/default.aspx </li></ul>

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