1.   A wrist device will record movements while awake and asleep, and a fingertip sensor will measure the amount of oxygen in the blood.

2.   To locate someone, anyone in the group can go to one of the electronic maps and scan a bar code on the wrist device.

3.   With the relentless miniaturization of technol ogy, the time has come for wrist devices that have function lists as long as your arm.

4.   Wrist devices of many sorts, on their way to a mall near you.