a company that provides services related to handling of mailing lists. There are two roles that a service bureau may play in fulfilling a list order: (1) owner's service bureau and (2) mailer's service bureau. The owner's service bureau is generally responsible for answering count requests and for fulfilling orders on a given list by extracting the data in the format specified. The mailer's service bureau is responsible for coordinating the integration and enhancement of all of the lists -- house and outside lists -- being used in the marketing campaign. The mailer's service bureau is typically responsible for address correction, merge/purge, applying data models, and otherwise enhancing the data.