Internet has become one of the essential parts of our daily life. We cannot imagine a smooth life without it, since it is the most important invention of the modem times. The present book is dedicated to explain the functioning of Internet and E-mail to the novice users.It is divided into foursections that cover ComputerFundamentals, Windows,Browser Concepts, How toaccess various sites and theConcept of WirelessCommunication. E-commerce and M-commerce, their future and various technologies have also been discussed in detail.This book can be of great help to the readers and users of internet as the book is illustrative and the language is simple.