Human-computer interactions in which computers are expected to be transported during the course of usage are defined as mobile computing. It allows wireless transmission of data, voice and video without the need of a fixed physical link. GSM, CDMA and LTE are some of the wireless technologies used by these devices. The guiding principles of mobile computing technologies are portability, connectivity, interactivity and individuality. Some of the examples of common mobile computing devices are portable computers, wearable computers, smart cards, personal digital assistants and laptops. This domain has greatly benefitted from the technical advancements in computing technology such as low-power PC processors, small size digital memory technology, and inexpensive display systems. Some of the security issues faced by mobile computing technologies include hacking, piracy, online frauds and industrial espionage. Mobile computing is an upcoming field of science that has undergone rapid development over the past few decades. Some of the diverse topics covered herein address the varied branches that fall under this category. This book is an essential guide for both academicians and those who wish to pursue this discipline further.