GIS Geographic Information Systems. These are designed to store, analyse and display spatial data which exist along a single surface. They are used for working with map data. Testing whether something is the case, such as whether an object is in a particular point in space. The representation of any curve requires an algorithmic expression.
Some algorithms allow a curve to be expressed precisely, so that any point along it can be known.
Used in solid modelling as a way of representing a solid. The space is decomposed into cells. Each cell has a simple topological structure, and also often a simple geometric structure. Computations involving vectors. Vectors are mathematical entities which possess both value and direction, as opposed to scalars, which possess simply value.