FILE - In this Thursday, Jan. 3, 2013, file photo, the "bookBot" glides down a row of drawers at the James B. Hunt Jr. Library at North Carolina State University in Raleigh. The automated book retrieval system is just one of many innovations in the new, state-of-the-art facility. (AP Photo/Allen Breed)

Associated Press
FILE - In this  Thursday, Jan. 3, 2013, file photo, the "bookBot" glides down a row of drawers at the James B. Hunt Jr. Library at North Carolina State University in Raleigh. The automated book retrieval system is just one of many innovations in the new, state-of-the-art facility. (AP Photo/Allen Breed)
FILE - In this Thursday, Jan. 3, 2013, file photo, the "bookBot" glides down a row of drawers at the James B. Hunt Jr. Library at North Carolina State University in Raleigh. The automated book retrieval system is just one of many innovations in the new, state-of-the-art facility. (AP Photo/Allen Breed)
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