Response to: What are Non Unicode characters

Revision 2
Emilio above mentioned EBCDIC (Extended Binary Coded Decimal Interchange Code). This was developed by IBM and (like ASCII) has 256 characters represented by 0 to 255.

Here's all the information you should need on Wikipedia: Character Encoding[^]

Even Morse Code is mentioned as it was an early coding system! Are you doing a project on this?