It is a computer system designed to allow users to collect, manage and analyze large volumes of spatially referenced information and associated attribute data.
Geographic information system. An organized collection of computer hardware, software, geographic data, and personnel designed to efficiently capture, store, update, manipulate, analyze, and display all forms of geographically referenced information.
Geographic Information System: A system of computer hardware, software and data for collecting, storing, analyzing & showing information about areas of the earth.
Analysis that combine relational databases with spatial interpretation and outputs often in form of maps. A more elaborate definition is that of computer programs for capturing, storing, checking, integrating, analyzing and displaying data about the earth that is spatially referenced.