Kahraman, CengizOztaysi, BasarOnar, Sezi CevikOtay, Irem2024-07-182024-07-182020978-981-122-333-4https://hdl.handle.net/11411/865315th Symposium of Intelligent Systems and Knowledge Engineering (ISKE) held jointly with 14th International FLINS Conference (FLINS) -- AUG 18-21, 2020 -- Cologne, GERMANYIntuitionistic fuzzy sets (Atanassov, 1986) are the sets whose elements have degrees of membership and non-membership satisfying the condition that their sum is at most equal to one. Thus, an expert can express his/her hesitancy through IFS whereas it is not possible with ordinary fuzzy sets. This paper presents a literature review on intuitionistic fuzzy sets based on some classifications with respect to type of intuitionistic fuzzy numbers. We use graphical and tabular illustrations for a better visualization of the review. We also propose a new extension of IFS whose name is q-Spherical fuzzy sets.eninfo:eu-repo/semantics/closedAccessİntuitionistic Fuzzy SetsOrdinary Fuzzy SetsPicture Fuzzy SetsQ-Rung Orthopair Fuzzy SetsSpherical Fuzzy SetsPythagorean Fuzzy SetsNeutrosophic SetsConference Object20719912N/AWOS:000656123200025