When an organization employs an IBM Domino server, it usually also deploys the supplied IBM Notes client for accessing the IBM Notes application for email and calendaring but also to use document management and workflow applications. As IBM Notes is a runtime environment, and the email and calendaring functions in IBM Notes are simply an application provided by IBM, the administrators are free to develop alternate email and calendaring applications. It is also possible to alter, amend or extend the IBM supplied email and calendaring application.