Each of the keys on a computer keyboad is a sensor. It detects when you press it and sends a binary number to the computer, telling the computer which
key you have presses. The keyboard acts as an information convertor, turning letters into a series of binary numbers which the computer can handle.
There are various ways to communicate and store letters and other characters as patterns of binary 'bits' (ones and zeros). The most common system is the ASCII code.
ASCII uses an 8-bit patterns or byte to identify which letter is being represented. These patterns can be stored in the computer, sent from one
computer to another, or saved onto a disc as a stream of binary bits. Using these patterns the computer can manipulate text, giving us the word processor, etc.
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