GIS (Geographic Information System) is a complex management system of spatial data i.e. databases, whose visual overview of certain information could contribute to better understanding of the data interaction on previously defined space.
GIS represents a live system whose data can be constantly updated and changed, depending of your needs. Each spatial data owns certain data i.e. attributes whose values can be simultaneously manipulated.
Huge number of supported formats allow easily upgrade and use of data in different programs, making data manipulation very efficient.
Using of basic function of the GIS tools could be possible with using of publicly available programs and appropriate training, with little investment and previous knowledge related to GIS.