End User: An end user or an end customer directly receives the service or employs the product. End users are not the only customers as there may be intermediate entities like purchasing departments, whose expectations or needs must be carried forward through a series of service contracts or requirement definitions. Customer: A customer may or may not have the ability to choose between different products and suppliers. For instance, in monopoly situations like local telephone and cable television services, there are scenarios when end users do not make the purchasing decision. It may include clients of social service agencies, court-appointed lawyers, or employees of an organization where the purchasing department makes choices.