The last decade of the 20th century saw a wave of uncertainty in the media business. The key question was who would own the two main stages of digital entertainment: production and distribution. As a result of that tormoil, a number of different companies have converged on the media industry. Broadcast and content providers such as Sky and on Digital began competing for digital TV subscribers. Telecommunication companies such as BT and Cable & Wireless promised to deliver video on demand. Services such as pay per view and online shopping added a new dimension to digital broadcasting. This book has been written in an easy language and alucid style. This book would serve as a reference book for readers and a semi-textbook for students.