Computer Data Representation

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

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  • Video here: http://www97.intel.com/en/TheJourneyInside/ExploreTheCurriculum/EC_DigitalInformation/DILesson2/
  • So how do you count in a binary system? How do you represent numbers like 103? In decimal (base 10) numbers, you have a 1s place, a 10s place, a 100s place, and so on, to represent value. The binary system has places or columns too. Only because you're in base 2, instead of each place being 10 times greater than the place before it, each place is only double (2 times) the one before it. video here: http://www97.intel.com/en/TheJourneyInside/ExploreTheCurriculum/EC_DigitalInformation/DILesson4
  • 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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