G
Geographic Information System (GIS)
Definition
Captures, stores, analyzes, manages, and presents data that is linked to location. Technically, a GIS is a system that includes mapping software and its application to remote sensing, land surveying, aerial photography, mathematics, photogrammetry, geography, and tools that can be implemented with GIS software. Still, many refer to "geographic information system" as GIS even though it doesn't cover all tools connected to the topology.
Reference:
Wikipedia