Undeciphered systems that may be writing List of writing systems
these systems have not been deciphered. in cases, such meroitic, sound values of glyphs known, texts still cannot read because language not understood. several of these systems, such epi-olmec , indus, claimed have been deciphered, these claims have not been confirmed independent researchers. in many cases doubtful writing. vinča symbols appear proto-writing, , quipu may have recorded numerical information. there doubts indus writing, , phaistos disc has little content or context nature undetermined. byblos syllabary – city of byblos isthmian (apparently logosyllabic) indus – indus valley civilization quipu – inca empire (possibly numerical only) khitan small script – khitan cretan hieroglyphs linear (a syllabary) – minoan mixtec – mixtec (perhaps pictographic) olmec – olmec civilization (possibly oldest mesoamerican script) phaistos disc (a unique text, possibly not writing) proto-elamite – elam (nearly old sumerian) rongorongo – ra...