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Cons: No-frills tablet lacks camera and microphone. Small selection of third-party applications available from Amazon. Data storage is small and cannot be expanded with memory cards. No option for cellular wireless broadband.

Barnes & Noble Inc.’s Nook HD

_ Price: $199 with 8 gigabytes of storage, $229 with 16 GB

_ Screen size: 7 inches diagonally

_ Screen resolution: 1440 by 900 pixels, 242 pixels per inch

_ Weight: 0.69 pound

_ Cameras: None

_ Battery life: Up to 10.5 hours of reading and up to 9 hours of video

_ Operating system: Modified version of Google’s Android

Pros: Storage memory is expandable with microSD card. Sharpest screen. Light.

Cons: Selection of third-party applications is small. Lacks cameras and option for cellular broadband.

Google Inc.’s Nexus 7

_ Price: $199 with 16 gigabytes of storage, $249 with 32 GB. Add $50 for 32 GB model with cellular capability.

_ Screen size: 7 inches diagonally,

_ Screen resolution: 1280 x 800 pixels, 216 pixels per inch

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