The Global Positioning System http://www.colorado.Edu/geography/gcraft/notes/gps/gps_f.html GPS Acronyms and Abbreviations http://www.igeb .gov/acronyms-ah.shtml Links to Links - Mapping, Survey, More http://www.rightofway.com Very Informative! Surveying & Much More Sustainable World Minnesota DNR's List of Links Map Libraries http://www-map.lib.umn.edu/map_libraries.html Glossary of GIS Terms http://www.esri.com/library/glossary/a_d.html Free Stuff http://www.gifsnow.com ESRI http://www.esri.com/ Trimble (GPS Equipment) http://www.trimble.com/