In essence, typologies of writing systems seek to classify the world’s diverse writing systems in principled ways. However, against backdrops of early, misguided assumptions (Gelb 1969 ) and stubborn term confusions, most proposals have focused primarily on the dominant levels of representational mapping (i. e., morphemic, syllabic, or phonemic), despite their shortcomings as idealizations (Joyce 2016, forthcoming; Joyce and Borgwaldt 2011; Meletis 2018). In advocating for exploring a more diverse range of criteria, either as alternatives or complementary factors, this paper outlines a promising framework for organizing typology criteria (Meletis 2018; 2020), which consists of three broad categories; namely, (a) linguistic fit , (b) processing fit and (c) sociocultural fit . Linguistic fit concerns the match between a language and its writing system and, thus, relates closely to the traditional criterion of representational mapping. Processing fit pertains to the physiological and cognitive aspects of a writing system, such as word spacing. Finally, sociocultural fit addresses the communicative and social functions of writing systems, such as implementing orthographic reforms. In singling out a particular parameter from each category, the paper illustrates its potential application as a typology criterion with cross-linguistic observations from the German (GWS) and the Japanese writing systems (JWS).