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Please could someone explain how each of these things work in about three sentences?

On February 18, 2011 By

Hi please may you explain how these 6 things work please:

•optical mark reader (describe how it works and where it is used)

•optical character reader (describe how it works and where it is used)

•Magnetic stripe reader (describe how it works and where it is used)

•Smart card reader (describe how it works and [...]

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Three versions of the iPad 2 are expected in 2011

On December 29, 2010 By

Three versions of the iPad 2 are expected in 2011
According to sources, it seems we can expect three models of the iPad 2. It is believed the models will support Wi-Fi with some also supporting either UMTS or CDMA. Verizon Wireless, which utilizes CDMA technology, began selling Wi-Fi versions of the iPad this [...]

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