Vector Space Model
The vector space model is a widely used model in computer science. Its wide use is due to the simplicity of the model and its very clear conceptual basis that corresponds to the human intuition in processing information and data. The idea behind the model is very simple, and it is an answer to the question, how can we compare objects in a formal way? It seems that the only way to describe the objects is to use a representation with features (characteristics) and their values. It is a universal idea, and it even seems to be the only possible way to work with formal objects.