Princeton University has a campus-wide site license to use Esri software packages. This site license allows Princeton University students, faculty, and staff to access all the free Esri GIS online courses as well as any course that “Requires Maintenance”. In order to take a course that “Requires Maintenance” a person should first join the Pumagic organization (https://pumagic.maps.arcgis.com/) using their Princeton NetID and Password. After you join the Pumagic site you can take all the free courses as well as any “Requires Maintenance” GIS online courses from this site (https://www.esri.com/training/catalog/search/). If you have any questions, contact the GIS and Map Librarian, T. Wangyal Shawa.