This comprehensive guide explores the essential aspects of wireless communication and mobile computing. It begins with an introduction to the key components, advantages, and challenges of mobile computing. The first chapter discusses the cellular concept, focusing on its elements and benefits, followed by an examination of the GSM air-interface, channel structures, and essential location management concepts like HLR and VLR. The second chapter shifts to Wireless Networking, covering Wireless LAN, IEEE 802.11, Bluetooth, and security concerns, along with wireless multiple access protocols and the impact of TCP over wireless. Further sections delve into Mobile IP, its components, operation, and challenges, as well as WAP architecture. The book concludes with an in-depth look at the Wireless Application Environment (WAE), discussing its services and future evolution, along with an overview of mobile applications, their components, and development processes. This resource is invaluable for students, professionals, and enthusiasts interested in the evolving landscape of wireless communication in mobile computing.