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26 Cards in this Set
- Front
- Back
What are some reasons for using computers?
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-it works faster than humans
-it is never tired or needs rest -it stores large amounts of information in small spaces |
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A bit is...
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1,0
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A byte is...
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8 bits
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A kilo byte is...
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1024 bytes - 2 to the power
of 10 |
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What is software?
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A set of instructions given by human
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What is aplication Software?
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Carries out a particular task
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What is hardware?
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Any part of a computer you can actually touch
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What is a device?
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An individual piece of hardware
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What does basic hardware conist of?
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Central processing unit(CPU) with input, output and backing storage devices
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What is input?
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The stage of computing where the main concern is getting the data needed by the program into the computer
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Some examples of input deivces
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Mouse, Keyboard, scanner
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What is output?
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When the computer produces the processed data as info in a form that is useful to the user,
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Some output deivces
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Screen, monitor, printer
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What is processing?
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When the computer follows the instructions using the data which has just been input.
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What is data?
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Any collection of numbers, characters or symbols that has been coded into a format that can be input in the computer and processed.
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What is information?
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Data which has been processed by the computer i takes on a context.
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What is the CPU?
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The Central Processing Unit is the 'brain' of the computer. It's where the data is sorted and the decision making happens.
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What does the CPU contain?
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Main Memory, ALU, Control Unit
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What does the main memory do?
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Holds the program instructions and data.
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Types of memory chips?
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RAM & ROM
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What does the Control Unit do?
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Fetches instructions from the main memor, it decodes them and lets them go through the ALU
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What does the ALU do?
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Performs claculations and makes decisions using the instructions.
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What is backing Storage?
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Used to store programs when the computer is switched off.
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What are some examples of backing storage?
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Floppy disk drives, magnetic tape drives, hard disks
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What is RAM?
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Random Acess Memory, it temperarily stores programs and data. The contents can be lost when the computer is turned off.
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What is ROM?
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Read Only Memory, stores the programs that run when the computer is on. Contents can't be changed or lost when the computer is off.
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