In this March 25, 2011 file photo, a Taiwanese model displays an Asus Eee Pad Transformer during its new product media event, in Taipei, Taiwan. The Transformer is a reasonably priced Android-based tablet that doubles as a “netbook” or small laptop if you buy an accessory keyboard dock ($109). You can get an accessory keyboard for any tablet, but the Transformer’s attaches securely, and the combination folds up like a laptop. The keyboard has a touchpad, extra ports and an additional power pack, prolonging the battery life.

First published in the May 19, 2012, 4:46 p.m. edition

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