A mobile enterprise is a corporation or large organization that supports critical business functions and use of business applications via wireless mobile devices. In a mobile enterprise, employees use mobile devices to do any or all of the following: access email, manage projects, manage documents, provide customer relationship management, conduct enterprise resource planning, fill out invoices and receipts, accounting vouchers, work orders, purchase orders, etc. and manage a corporate calendar and address book. These are the most common applications though many other corporate mobile applications are being developed and used by organizations around the world.