The Nature Conservancy (TNC) has set an ambitious goal to work with others to ensure conservation of at least 10 percent of every major habitat type on earth by 2015. To accomplish this, it has developed an approach called Conservation by Design, which involves setting priorities, designing strategies, taking action, and measuring results at multiple scales. Conservation by Design creates vast amounts of information, for which TNC has selected Esri's ArcGIS Desktop software to maintain, analyze, and share. Please see the articles on pages 30-35.