Designing a decision support system for recommending smartphones using fuzzy ontologies Juan Antonio Morente Molinera, Ignacio Javier P´ erez G´ alvez, Robin Wikstr¨ om, Enrique Herrera Viedma, and Christer Carlsson Dept. of Computer Science and Artificial Intelligence University of Granada, Granada Spain. And Department of Computer Sciences and Engineering University of C´ adiz, C´ adiz, Spain. And IAMSR, ˚ Abo Akademi University, Turku, Finland {jamoren,viedma}@decsai.ugr.es ignaciojavier.perez@uca.es {robin.wikstrom,christer.carlsson}@abo.fi Abstract. Nowadays, smartphones have become indispensable items for everybody. Thanks to them, people can communicate and access Internet at any time regardless of where they are located. New smartphones be- longing to a high amount of labels and with different features and prices keep appearing constantly in the market. This way, there is a need of tools that help buyers to select and buy the smartphone that better fits their necessities. In this article, a decision support system build over a fuzzy ontology has been designed in order to help people to select the perfect smartphone for them. Linguistic labels are used in order to pro- vide the buyer with a comfortable way of expressing himself/herself. Keywords: Decision support system; Fuzzy ontology; Linguistic mod- elling 1 Introduction Smartphones are probably one of the most popular items these days. They allow people to communicate, surf the Internet and execute programs, called apps, at any time regardless of the place. They combine benefits and functionalities of a mobile phone, a web browser, a GPS device and a computer in a single small device. Smartphones are constantly evolving with new features, becoming, at the same time, cheaper and faster every year. Nowadays, they are items that are periodically acquired by a wide range of people from the first world pop- ulation belonging to different ages [1]. Everyone is expecting new smartphones with new features in order to replace the ones that they already have. This way, smartphones market moves a huge amount of money. Furthermore, smartphones