Ascii was very simplistic, and so was extended by adding 'extended' sets by various manufacturers.
Apart from being confusing this was still restricted to 256 characters. Now computers are more widely
established around the world the need to show other characters such as Japanese and Chinese languages along
with various symbols became more important. Unicode is an attempt to standardise every character possible
and the latest version (4) is shown below. Tables are in PDF format so you will need Adobe Acrobat Reader to view them.
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