undeciphered writing system
written form of language that is not currently understood
Mixtec writing
logographic writing system
Linear Elamite
writing system from Elam
quipu
communication media historically used in the region of Andean South America
Linear A
undeciphered writing system from Crete
Indus script
script, short strings of symbols associated with the Indus Valley Civilization
Proto-Sinaitic
Middle Bronze Age script
Isthmian
Mesoamerican writing system in use in the area of the Isthmus of Tehuantepec from perhaps 500 BCE to 500 CE
Cretan hieroglyphs
undecyphered bronze-age Cretan writing system
Byblos
undeciphered writing system