Corporations that provide Internet access for their employees, customers, students, or members will sometimes limit this access in an attempt to ensure it is used only for the purposes of the corporation. This can include content-control software to limit access to entertainment content in business and educational settings and limiting high-bandwidth services in settings where bandwidth is at a premium. Some institutions also block outside e-mail services as a precaution, usually initiated out of concerns for local network security or concerns that e-mail might be used intentionally or unintentionally to allow trade secrets or other confidential information to escape.