11.   One existing system, called Cyclops, uses light beams projected along the back of the service box to judge whether serves were in or out.

12.   One of three primary products the company sells, its stereolithograph machine essentially uses laser beams to sculpt plastic.

13.   Remote controls for cars need greater range than the kinds of remotes used around the home to control televisions and VCRs, which use infrared beams.

14.   Since it uses a beam of light instead of a rubber ball to track the way it moves the cursor, no cleaning is required.

15.   Technicians used laser beams to center her exactly in the field of the detectors.

16.   The laboratory uses beams of argon atoms to vaporize a mineral called zirconia and deposit it in perfectly aligned crystals on a thin tape of nickel alloy.

17.   The machines are designed to use electron beams to kill bacteria, including anthrax, in the mail.

18.   The patent involved a process for using electron beams to make a near-flawless mirror.

19.   The photo-electronic detector uses a beam of light that shines across the chamber into a light- sensing device.

20.   The system uses infrared beams to scan the pavement and detect center line and roadside markings.