Undeciphered writing systems
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Undeciphered writing systems are the writing systems have not been deciphered. Several of these systems, such as Epi-Olmec, Phaistos and Indus, are claimed to have been deciphered, but these claims have not been confirmed by independent researchers. In Vinča and other cases the system, although symbolic, may turn out to not be writing.
- Jiahu Script -Peiligang culture, from the 7th millennium BC, proto-writing.
- Vinča script, Neolithic Europe, from the 6th millennium BC, proto-writing.
- Banpo Script -Yangshao culture, from the 5th millennium BC, proto-writing.
- Bronze Age writing (3300 to 1200 BC)
- Indus script — Indus Valley Civilization, from ca. 3300 BC, likely proto-writing.
- Proto-Elamite — Elam, from ca. 3200 BC.
- Linear Elamite, from ca. 2200 BC.
- Linear A — Minoan, from ca. 1900 BC, a syllabary.
- Cretan hieroglyphs - from ca. 1900 BC.
- Wadi el-Ħôl script, ca. 1800 BC, likely an abjad.
- Byblos — the city of Byblos, ca. 1700 BC.
- Phaistos Disc, ca. 1600 BC, a unique text.
- Cypro-Minoan syllabary, from ca. 1500 BC.
- Mesoamerican writing systems (1000 BC to 1500 AD)
- Olmec — Olmec civilization, ca. 900 BC, possibly the oldest Mesoamerican script.
- Isthmian, ca. 500 BC, apparently logosyllabic.
- Zapotec — Zapotec, ca. 500 BC.
- Mixtec — Mixtec, 14th century, perhaps pictographic.
- Quipu — Inca Empire, 15th century, non-linguistic symbol system.
- Khitan small script — Khitan, 10th century.
- Voynich manuscript, before 1520.
- Rohonc Codex, before 1838.
- Rongorongo — Rapa Nui, before 1862, perhaps a syllabary.
- Eskayan — Bohol, Philippines, ca. 1900.
- Codex Seraphinianus, 1970s.
