Developments in E-commerce and M-commerce are inarguably the biggest technological advancements in modern-day businesses and technologies. Its impact has reached every corner of the world, benefitting organisations across sectors and industries. The future role of E-com and M-com are predicted to be a necessity rather than a value-add. This book is aimed at people looking to understand the fundamental concepts related to E-com and M-com, its relevant technologies and current business applications. The book provides coverage of all the elements of E-com and M-com including concepts, evolution, models, frameworks, technologies, payment protocols, payment systems, security measures, and open issues related to both areas. It also covers the list of companies offering electronic payment systems along with their case studies, and provides overview of contemporary mobile apps. It also highlights past, present and future scenarios of both the areas and their impact on businesses, customers and societies. It is a comprehensive and a single source guide for both graduate and postgraduate students, professionals and anyone who want to level up their understanding in these fields.