The business environment is at present moving through a dynamic and turbulent phase driven by technological change, globalisation, and increasingly competitive markets. This paper sets out to review the impact of the Internet on the business processes that support marketing, sales and the supply chain. The paper differentiates between E–Business and E–Commerce, reviews customer relationship management and its relevance to E–Business, examines examples from the area of B2B (business to business) supply chain and channel management, and B2C (business to consumer) electronic retailing, and discusses the relevance for small and large organisations. The IT and business processing revolution has still a very long way to go, but the way ahead has become much clearer.