GIS stands for geographic information system. It involves capturing, storing, manipulating, analyzing and displaying spatially referenced data on Earth. GIS is unique in that it handles spatial information referenced by location. It developed from technologies like digital cartography, CAD, and database management systems. The core components of a GIS are spatial data, hardware/software tools, and specific applications. Spatial data has characteristics like geometry, topology, location with attributes. GIS data can be stored in vector or raster models. GIS provides benefits like better information management, analysis, and scenario modeling for applications in facilities management, environmental analysis, transportation and more.