ISO-8859 is the standard for 8-bit character encodings. 8 bits give you 256 combinations that are suitable for most extensions of the Latin alphabet, but not for Chinese characters.
ISO-8859-1 is one of the "versions" of the ISO-8859 standard that supports most Western European languages (French, German, Spanish, ...). For Central European languages (Polish, Czech, Slovak, ...) you need ISO-8859-2, etc.
ISO-8859-1 ISO-8859-2 è ISO-8859-1, , - č ISO-8859-2. .
Unicode .