EDU

.edu

The domain name edu is a sponsored top-level domain in the Domain Name System of the Internet. Since 2001, new registrants to the domain have been required to be United States-affiliated institutions of higher education, though before then non-U.S.-affiliated—and even non-educational institutions—registered, with some retaining their registrations to the present.

The above text is a snippet from Wikipedia: .edu
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!