This code is used to identify the site in a unique way. A site belongs to one and only one company. A financial site corresponds to a financial organisation (head office, factory,...) : it is possible to link several geographical sites to one financial site. All operational management acts are carried out from within a site: such a notion is very important when considering the software as a whole. (See documentation). Each user can be associated with a site by default and by module. Depending on the function being used, the default site is proposed automatically. It can be modified by another site authorized for the operator, depending on their authorizations.