This document is the introduction to the Global Information Technology Report 2009-2010, which examines the role of information and communication technologies (ICT) in fostering sustainability. It is edited by Soumitra Dutta of INSEAD and Irene Mia of the World Economic Forum. The report features articles that discuss how ICT can support sustainable development and competitiveness. It also includes the Networked Readiness Index rankings, country case studies on ICT strategies, and data on ICT adoption and usage. The introduction emphasizes the important role ICT will play in enabling renewed economic growth and promoting environmental and social sustainability.