Sony and Casio Computer have both unveiled improved versions of personal digital assistants they each launched in 2002.
Sony's PEG-SJ33 is an updated model of the PEG-SJ30 that it launched in mid-2002. The most obvious difference to the eye is a series of colorful, hard plastic screen covers available with the SJ33. Sony has black, orange, and blue covers available to make the SJ33 appear a much more colorful PDA than its predecessor.
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