What system is UTF8 built off?

UTF-8 is built on the Unicode system, which is a comprehensive character encoding standard designed to support all of the world's writing systems. Unicode aims to provide a unique number, or code point, for every character, regardless of the platform, program, or language.

UTF-8 is one of the encoding schemes defined by Unicode and allows for variable-length encoding of characters. It can represent any character in the Unicode standard, making it highly versatile for text processing. By using 1 to 4 bytes per character, UTF-8 can efficiently encode standard ASCII characters in a single byte while also accommodating a wide range of characters from different languages and symbols when more complex byte sequences are used.

The other systems mentioned, like ASCII, binary, and hexadecimal, serve different roles in data representation. ASCII, for instance, is a character encoding standard that is a subset of Unicode. The binary system represents data in ones and zeros, while hexadecimal is a base-16 number system often used for addressing memory locations or color codes in web design. However, UTF-8 relies specifically on the Unicode system as its foundation for character encoding.