1) The study of writing systems 
Grammatology is a term coined by the linguist Ignace Gelb in 1952 to refer to the scientific study of writing systems or scripts. It includes the typology of scripts, the analysis of the structural properties of scripts, and the relationship between written and spoken language. In its broadest sense, some scholars also include the study of literac...
study of systems of writing
grammatology The study of writing systems.