Nineteen ISO 8879:1986 character entity sets used by many DTDs: Added Latin 1 Added Latin 2 Added Math Symbols: Arrow Relations Added Math Symbols: Binary Operators Added Math Symbols: Delimiters Added Math Symbols: Negated Relations Added Math Symbols: Ordinary Added Math Symbols: Relations, Box and Line Drawing Alternative Greek Symbols Diacritical Marks General Technical Greek Letters Greek Symbols Monotoniko Greek Non-Russian Cyrillic Numeric and Special Graphic Publishing Russian Cyrillic