1.  Types of Writing Systems

• Proto-Writing: Rudimentary with small no of signs & room for interpretation(Mixtec & Naxi)
• Logographic: Numerous signs, each one for morpheme. (Ex: Sumerian Cuneiform, Khitan Chinese, Classic Yi, Jurchen)
• Logo-phonetic: Two types of signs: For morphemes & for sounds(Ex:Maya, Akkadian/ Assyrian cuneiform, Hieroglyphic, Japanese)
• Ideographic Symbols representing ideas. Ideally, can be read by anyone

More varieties

• Syllabic: Mostly phonetic, rest for number, punctuation. (Ex:Iberian, Linear A & B Cherokee, Cypriot, Old Persian, Meroitic)
• Consonantal Alphabetic: Vowels unwritten. (Ugaritic, Arabic,Proto-Canaaite & Phoenician, Berber & Tifinagh, Aramaic)
• Syllabic Alphabetic: Brahmi and its descendents - both syllabary & alphabet.
• C and V Alphabetic: Separate consonant & vowel symbols. (Avestan, Coptic, Cyrillic, Futhark, Glagolitic, Korean hangul, Ogham)