so, for philological applications, different technologies are required. References Michael D. Coe and Justin Kerr, The Art of the Maya Scribe, Thames and Hudson. 1997. Martinez, Ma. del Carmen Rodríguez; Ponciano Ortíz Ceballos; Michael D. Coe; Richard A. Diehl; Stephen D. Houston; Karl A. Taube; Alfredo Delgado Calderón; "Oldest Writing in the New World", in Science, 15 September 2006, 313, no. 5793, pp. 1610–1614. Nielsen, Jesper, Under slangehimlen, Aschehoug, Denmark, 2000. Sampson, Geoffrey. Writing Systems: A Linguistic Introduction. Hutchinson (London), 1985. External links Corpus of Maya Hieroglyphic Inscriptions Program, at the Peabody Museum of Archaeology and Ethnology, Harvard University. Corpus of Maya Hieroglyphic Inscriptions, volumes 1–9. Published by the Peabody Museum Press and distributed by the Harvard University Press. Logographic writing systems Proto-writing