Preface for the special issue on mobile and networking technologies for modelling social applications and services

In the recent years researches on social, mobile and networking technologies have made rapid progresses, also considering the pervasiveness of the Internet as new platform for social interaction and stimulus of the growing demand for advanced mobile services. Our purpose in organising this special issue was to stimulate the scientific and technological discussion among academic and industrial research groups motivating them in developing innovative models for Mobile and Networking Technologies in Social Applications and Services.