SAN FRANCISCO (AP) - A civil liberties watchdog group is expressing concern over the San Francisco Public Library’s plans to track books by inserting computer chips into each tome.

Library officials approved a plan Thursday to install tiny radio frequency identification chips, known as RFIDs, into the roughly 2 million books, CDs and audiovisual materials patrons can borrow. The system still needs funding and wouldn’t be ready until at least 2005.

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