1.   The camera tracks the movement of these materials, thus assisting in diagnosis of cancers or various types of cardiovascular disease.

2.   The researchers would track eye movement to see which picture the tots would choose.

3.   Although Internet software can track movement on the web, it cannot get personal information such as addresses and age.

4.   An American company, protecting American oil companies and American citizens, uses aircraft with advanced night-vision technology to track guerrilla movements.

5.   An optical mouse uses a tiny digital camera instead of a rolling ball to track movement.

6.   And in many cases, Internet users are completely unaware that their movements are being tracked, anonymously or otherwise.

7.   Area distributors sometimes use computers to organize their highly profitable enterprises and remote video cameras to track the movements of law enforcement officials.

8.   As visitors walk through the gallery, they create their own composition as motion sensors hidden on the ceiling track their movements, triggering different sound installations.

9.   At one point, he helped to develop a computer program to track the movements of suspected Soviet spies.

10.   At the same time, bonds, which track interest rate movements, have gained.