In a practical approach to strategic planning for information systems, this study describes the evolution of information technology in business, in terms of its impact on business performance and contribution to the strategic development of business organizations. It explores how information technology can be related to the strategic planning of a business in order not only to support the strategy but also to enable an organization to change its conduct of business to achieve advantages. It provides tools, techniques and a management framework for identifying the opportunities information technology offer a business. The second part of the text addresses the supply of information technology, and how it can be effectively managed to satisfy business demands for information and systems.