This book provides state-of-the-art information regarding the functions and applied principles of agent-based technology. Agent-based technology facilitates a novel computing standard, where intelligent agents can be employed for carrying out tasks such as reasoning, planning, decision-making, scheduling and sensing. In this type of system, software agents with enough intelligence and independence can either operate independently or coordinate along with distinct agents to execute tasks and missions. This book aims to provide updated practical uses of this technique in distinct areas, like grid computing, adaptive virtual atmosphere and e-commerce through information contributed by veteran authors. The presented applications will be of great value for researchers and practitioners to comprehend the practical application of agent-based technology, and also to employ this technique creatively in distinct fields.