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The increased popularity of web services is accompanied with an increase in both provider and service number. This fairly large service number causes a deficiency in the selection of the most pertinent service, and makes it an effortful and time-consuming task.We propose the WSPAB (Web Service Personal Address Book) tool that aims at defining a complete solution for facilitating the task of finding the most pertinent web service. This includes two sub tasks, discovering and selecting. In this paper, we present the first part of the tool concerning the automation of the selection process, taking into consideration the quality of service (QoS) and user preferences. The WSPAB accomplishes the automatic selection of a service by filtering web services according to certain aspects of QoS and certain user requirements; then classifying these services using the formal concept analysis (FCA) approach, enabling users to easily select their needed service, identify its potential substitutes and keep trace of them either for future use, or to be shared with others.