2. Computer systems
A computer system takes a set of digital inputs, processes them and creates a set of outputs. This is done by a combination of hardware and software.
In other words, you put some data into a computer (input), something happens to that data (processing) and then the computer puts out a result (output).
In order to do this, the computer needs instructions to tell it what to do. The instructions are provided by a program.
The diagram below shows you the idea of a computer system in its most basic form:
Desktops, laptops, smart phones and tablets are all examples of computer systems. They all have input, output, processing and storage capability.
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