Final answer:
A geographical information system (GIS) is a computer system that integrates, stores, analyzes, and displays spatial information. It is used in various fields to manage and analyze geographical data.
Step-by-step explanation:
A geographical information system (GIS) is a computer system capable of integrating, storing, editing, analyzing, sharing, and displaying spatial information. GIS uses a computer program to assimilate and manage many layers of map data, providing specific information about a place. GIS specialists use GIS software to create and analyze geographical information for various organizations, such as government agencies or private businesses. For example, in business applications, GIS can be used to find a good location for a retail store based on the analysis of spatial data layers.