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GPS AND RFID BASED ASSET TRACKING WITH MOBILE DEVICES. Radio frequency identification (RFID) refers to a set of technologies that use radio waves to identify and transmit information from tagged objects. This emerging technology has taken on increased importance in the last few years generating enormous amount of interest in the supply chain area. Using a combination of RFID and real time location systems (RTLS), assets can be tracked accurately in real time enabling enterprises to reduce errors introduced by manual processes, processing time and labor: this kind of solution can be applied to a variety of tasks, structures, work systems and contexts along the value chain, including business-to-business logistics, internal operations, business-to-consumer marketing, and after-sales service applications. The aim of this thesis is the development of a software suite that could illustrate the benefits of an RFID and GPS based solution in a supply chain environment. In a first part, automatic identification and data capture technologies (AIDC) and RTLS are analyzed in detail describing the issues and the benefits they could bring in many sectors. Successively the software development phase is described, pointing out the purpose and the logic of the software as well as the design details.