We track MIT OpenCourseWare Web site usage statistics to study how MIT OCW is used. This data is used only in the aggregate for evaluation purposes. Individual user data, to the extent we capture it, will never be made available to anyone, nor will it be used for any commercial or philanthropic purpose, without your express consent. If you voluntarily provide your email address or other contact information, we might use it to inform you of changes to OCW or to ask for your feedback on some aspect of OCW. If and when there are future changes to our privacy policy, we will post them on this page. If you have questions or concerns about this policy, please send us feedback.