Michael A. Cusumano is the Sloan Management Review Distinguished Professor of Management at the Massachusetts Institute of Technology's Sloan School of Management, with a joint appointment in the MIT Engineering Systems Division. He began studying the software business in 1985. He is co-author of a classic best-seller on the company, Microsoft Secrets as well Platform Leadership, The Business of Software, and Staying Power and Competing on Internet Time with Yoffie. His latest book, Staying Power: Six Enduring Principles for Managing Strategy & Innovation in an Uncertain World, was named one of the top business books of 2011 by Strategy + Business magazine. Professor David B. Yoffie is the Max and Doris Starr Professor of International Business Administration at Harvard Business School. He first met Andy Grove in 1987 and joined the Intel board of directors in 1989. He remains the longest-serving member of the Intel board. Yoffie has also written 40 Harvard Business School cases on Intel, Microsoft, and Apple, including the most widely used cases on these companies. He is the author of nine books, including the bestselling Competing on Internet Time with co-author Cusumano. He has also written extensively for the New York Times, the Wall Street Journal, and the Harvard Business Review. Annabelle Gawer is the highly-cited author of two books (Platform Leadership, and Platform, Markets and Innovation) and over a dozen articles in top international journals, Prof. Gawer's seminal research on platform leadership and innovation ecosystems explains how innovation and competition interact to shape platform-based markets and the digital economy. Annabelle's work has been featured in The New York Times, The London Times, The Financial Times, The Economist and The Wall Street Journal. A pioneer of international stature in the field of digital platforms, Annabelle is a leading voice in advancing research (Google Scholar indicates over 5430 citations as of February 2018), as well as managerial practice and European policy. Prof. Gawer advises the European Commission, the UK Parliament House of Lords, and the OECD on issues related to the future of ICT research directions in Europe and on the question of regulation of online platforms.