1.   As an analyst drives along, a Navigation Technologies system tracks his position.

2.   Big investments also are planned for computer systems to track the profitability of every customer, and spot opportunities to sell them more loans and investment services.

3.   A password-protected, Web-accessible system tracks e-mail traffic into DEAs.

4.   But instead of tracking only sales, the systems also track the cashiers, looking for unusual patterns even as sales are taking place.

5.   If customers take up this offer, the system then can track their network use by address and time, no matter where they go on the Web.

6.   If two of the people in the system hug one another, the Tyzx system can correctly track each individual when they separate.

7.   In theory, this system could track not only bioterror attacks, but also the ebb and flow of more mundane conditions, like flu.

8.   It offers the choice of leaving a message or hanging on while the system tracks you down.

9.   Or the system could track down a person, ringing first at home, then at work, then in the car.

10.   One problem, he said, is that intermittent leave means that businesses can be required to give employees as little time off as a payroll system might track.