3.4) Explain the use of code to represent a character set
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Character Key
A character key of a computer is the symbols that the computer can recognise and use. Each symbol is distinguishable from another. Normally determined by reference to charcters on keyboards.
ASCII
Is a 7bit code that uses a single byte to represent a character. The 8th bit was used for error checking but is now used for another 128 characters.
UNICODE
Unicode used for many world languages because it uses 4 bytes allowing over 4 billion possible characters
EBCDIM
An IBM mainframe character encoding system which uses one byte. it is not the same as ASCII as different binary codes represent different the same letters.
