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