GEO stands for Geographic Information System (GIS). GIS is a computer system used to capture, store, analyze, manage, and present spatial or geographic data. It is used in many industries such as urban planning, land surveying, natural resource management, and environmental protection. NAT is an acronym for Network Analysis Tools, which are used to analyze the structure of a network. Network Analysis Tools are used to identify patterns in the network, such as the shortest path between two nodes, or the most efficient route for a delivery truck.