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revision year 8 autumn - Coggle Diagram
revision year 8 autumn
a computer system is a set of hardware and software devices that input, output, process and store data
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the CPU (central processing unit) fetches, executes and decodes instructions (the FDE cycle)
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even if something has a CPU , it doesn't mean that it is a computer
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non-examples of embedded systems include phones, computers etc
examples of embedded systems include washing machines, ovens, fridges, dishwashers etc
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a way to remember that utility software cleans and protects the computer is that a utility room in a house is used to store cleaning supplies
there are 3 types of software: operating system, application software and utility software
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to increase the speed of a computer you can increase the clock speed, increase the cache memory or increase the number of cores
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