Question : whom is the learder in GSP hardware and software

what companies are the learders in GSP hardware and GIS software
What are the standards for both GPS and GIS

Answer : whom is the learder in GSP hardware and software

In my opinion, TatukGIS is head-and-shoulders above all the rest, including ESRI and MapInfo. http://www.tatukgis.com/Home/home.aspx

For standards, I recommend the Open GeoSpatial Consortium, http://www.opengeospatial.org/