1. A system comprising: a collector system comprising a database, the collector system connected to a plurality of enterprise resource planning systems, each enterprise resource planning system comprising a module performing a different business function from other module(s) in the same system; the collector system operative to: identify whether each module in each enterprise resource planning system is used by an entity in the enterprise resource planning system; when the module is used by the entity, record the entity using the module in the database; otherwise, when the module is not used, do not record the entity using the module in the database; and repeat the process for each module in each enterprise resource planning system until all modules have been identified.