Some pages have access restrictions set on them. We use the icon in lists to indicate that the page the list item links to has access restrictions set. In most cases access will be limited to IS&T staff. In some cases it will be limited to just the Faculty and Student Experience team, or to IS&T CSS staff.
We try to keep restricted pages to the absolute minimum, but we are tracking some internal MIT financial information as well as private information like home phone numbers or personal cell phone numbers. If you have trouble getting to something you should be able to get to, please contact the Faculty and Student Experience.