ASCII and Unicode
What is a character set?
A defined list of characters recognized by the computer hardware and software
What is a glyph?
A small graphic symbol.
What is the difference between ASCII and Unicode?
ASCII is a 7-bit character set which defines 128 characters numbered from 0 to 127 Unicode is a 16-bit character set which describes all of the keyboard characters.
Why do we need to use Unicode for modern computers?
Because you need all of the characters plus foreign ones too which is quite a lot of characters.
Why do we need to store more data for glyphs, in comparison with standard characters in the ASCII character set?
There are more languages so more data has to be used.