It's no surprise that companies are integrating PDAs and cellular telephones; each deviceoffers functions that complement the other and many people carry and use both. This integration, although desirable, pits the small, lightweight phone?s appeal against the desirability of a PDA with a large screen and qwerty keyboard. Today?s integrated devices address this tension much better than earlier devices such as the Qualcomm (now Kyocera) pdQ 1900 Smartphone, which was 9.6 x 2.6 x 1.4 in. and weighed 9.8 oz. when it was introduced in 1999. In this month?s column, we review four of the newest devices.