The humble PDA has come a long way since the early days of Palm Versus Psion and the inexorable march of Microsoft into the Pocket PC arena has made many of the Palm manufacturers sharpen up their act, none more than Sony and their Latest Sony Clie TH55 is living proof.

And sharp it is! the Sony Clie TH55 is a cunning use of the Palm operating system and Sony's own user interface and jog dial control software to provide the best user experience on the inside, while the style and finesses that has made Sony a brand that epitomises gadget cool is equally apparent in the external design of the Clie TH55.

The latest Palm-OS based Treo device looks and feels quite similar to its predecessor, the Treo 650. The manufacturers have made a number of subtle design changes, however, including the welcome addition of dedicated send and end call keys.