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ACROSS
1)  the cardinal number that is the sum of eleven and one
2)  a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen
3)  a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)


DOWN
1)  being one more than ninety
2)  the bureau of the treasury department responsible for tax collections
3)  the branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information

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