We adhere to the methods and to the tools of modelling of the data with the aim of the
development of a system computerized by management of the information for an organization.
We pursue the cycle of development of a computer system, following the stages connected with the notions
of analysis, model and system like:
Crop of the information
Data dictionary
Abstract data modal : The entity modal- association
Logical data modals : Hierarchical, network, relational
