Gathering information about theological Islamic dissidents/sects and classifying and listing them in various ways as a literary genre in Islamic literature has been of interest to Muslim scholars as a result of scholarly curiosity or in the aim of criticizing and refuting their ideas from a certain ideological and theological point of view. After especially taking the ḥadīth saying that the Muslim community will divide into 73 sects as a main reference, heresiological classifications or lists became more systematic and schematic. (...) These heresiological classifications or lists are in fact mostly different attempts in terms of material, method and style. This enables to determine and offer possible traditions of classifying and listing sects based on the similarities, differences and connections among them. This dissertation that examines heresiological classifications and lists that emerged in particularly seven centuries after the hijra and appeared in books of various literary genres tries to identify their characteristics and historical development, and categories them according to their methods, scopes, styles and contents in order to reach a holistic understanding. Also it offers possible traditions for heresiological classifications or lists after analysing and comparing the available ones. (shrink)