Answer:

EDU

Answer	Crossword Clue
EDU	End of a prof's e-mail
EDU	Brown or Rice address ender
EDU	Butler's domain?

EDU	Address ending required for some student discounts
EDU	Butler address part?
EDU	Part of a dean's e-mail address
EDU	End of a university Web address
EDU	Kin of .com and .org
EDU	School's URL ending
EDU	School's URL tag
EDU	Scholastic URL ender

EDU	Campus URL suffix
EDU	School's URL suffix
EDU	University extension
EDU	Campus equivalent of .com
EDU	Campus extension
EDU	End of a student's e-mail addr.
EDU	College Web-site ext.
EDU	College Web-site extension

EDU	Part of a collegian's e-mail addr.
EDU	Campus URL ender
EDU	Certain URL extension
EDU	Student's e-mail addr. ender
EDU	Univ. domain name
EDU	Academic URL ender
EDU	.org relative
EDU	College Web address ending

EDU	Internet address suffix
EDU	Relative of com
EDU	Web address suffix
EDU	E-mail address ending
EDU	Part of a prof.'s address
EDU	URL ender
EDU	URL ending
EDU	It may come after a dot

EDU	School URL ending
EDU	University Web address suffix
EDU	Web address ending
EDU	Relative of .org
EDU	Coll. online extension