The x in xG

The three articles in this special issue focus on the impact of mobile wireless communications networks (xG) on Information Technology and Systems. The “x” in xG is an expression of the rapid and impactful growth of mobile wireless communications networks. These generational increments are more than simply increasing network speed and connecting more devices. Each network generation in cellular and wireless communications has its own uniqueness that deserves rigorous and focused studies. This need is so because xG heralds an era of far- and wide-ranging services, applications, and systems that promise to change business, society, and government.