Computer Applications Notes Grade 6


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Computer Literacy - Grade 6

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  • Decode using the chart above
  • Computer Applications Notes Grade 6

    1. 1. Computer Applications Grade 6
    2. 2. 3 Types of Computers: Main Frame Microcomputerb) Largest b) Smallestc) Most Expensive c) Least Expensived) Stores the Most d) Stores Least Data Amount of Data Minicomputer 2nd Largest 2nd Most Expensive 2nd in Storing Data
    3. 3. Electrical Signals: Digital– Uses On or Off electrical signals. Analog – Uses a smooth continuous change in the electrical signal.
    4. 4. 4 Parts of the Computer: Input – Enters data into the computer Output – Returns processed data Memory – Stores data Central Processing Unit (CPU) – The brain or the heart of the computer
    5. 5. Memory: Random Access Memory (RAM)2) Memory that we use when we are using the computer3) Can be changed4) Temporary Read Only Memory (ROM)6) Memory that the computer uses7) Can Not be changed8) Permanent
    6. 6. Central Processing Unit: Made up of the following two units: Control Unit – directs the flow of the program or data. Arithmetic Logic Unit (ALU) – all math and comparing is done here.
    7. 7. 4 Parts of the Computer: MEMORY CPU INPUT CONTROL OUTPUT ALU
    8. 8. Inside the Computer: Computer Chip – thin wafer of silicon that is an 1/8th of an inch square. Integrated Circuit Chips (ICC) – integrated electrical circuits on the tiny computer chips.
    9. 9. Large Scale Integration (LSI) Process of making a computer chip: A design is made. The design is photographed and reduced to chip size. Photograph is “baked” on the silicon. The chip is magnetized. The chip is tested and placed in protective casing.
    10. 10. Computer Definitions: Bit (binary digit) – tiny electrical signal. If the signal is On = 1 and if the signal is Off = 0. Byte – Pattern of 8 electrical signals or 8 bits. Everything on the keyboard has its own pattern. Nybble – ½ a byte. Memory Size:e) 1 Kilobyte (K) – 1024 bytesf) 1 Megabyte (meg) – 1024 Kilobytesg) 1 Gigabyte (gig)–1024 megabytesh) 1 Terabyte (TB)–1024 gigabytes1 Gigabyte = approx 500,000 letter-size pages of text information
    11. 11. More Definitions: Computer Hardware – Any part of the computer (monitor, disk drive, speakers, printer…). Computer Software – Programs used on the computer (Microsoft Word, Power Point, Sim City, LOGO…..). Binary Code – Base 2 number system made up of 1’s and 0’s. ASCII Code – Each character on the computer has it’s own code number. (See the chart on the next slide). Don’t write this in your notes!
    12. 12. ASCII Chart: