Superset

In the context of character sets, a superset refers to a character encoding standard that contains all the characters defined in another character encoding standard, as well as additional characters. For example, Unicode is considered a superset of ASCII, since it includes all the ASCII characters and many more characters from other scripts, such as Greek, Hebrew, and Chinese. When a computer system supports a superset of a character encoding standard, it is capable of representing and processing all the characters defined in that standard, as well as additional characters that may be used in other languages or writing systems. The concept of a superset of character sets is important for ensuring compatibility and interoperability between systems and applications that use different character encoding standards.