GIS is your tool, not your career. How can you quickly begin applying GIS in your work? The GIS 20: Essential Skills, third edition, presents step-by-step instructions, illustrations, and practical tips on how to perform the top 20 skills needed to successfully use a geographic information system (GIS). These skills include finding and editing data, querying GIS maps, creating reports, and sharing and publishing maps. Note: This e-book requires ArcGIS software. You can download the ArcGIS Trial at http://www.esri.com/arcgis/trial, contact your school or business Esri Site License Administrator, or purchase a student or individual license through the Esri Store.