In computing, which character encoding standard is designed to support the representation of text from most of the world's writing systems, assigning a unique code point to each character, unlike older standards that were limited to specific languages or regions?

1. AASCII (American Standard Code for Information Interchange)
2. BEBCDIC (Extended Binary Coded Decimal Interchange Code)
3. CISO 8859-1
4. DUnicode (Universal Coded Character Set)