11.   Another great moment came years ago, when Sheppard was testing a new sound system at Yankee Stadium, a day or two before opening day.

12.   Another problem is that many banks have tested their systems in individual areas but not all at once.

13.   As this article is being written, surgeons at the University of California at San Francisco Medical Center are about to test the system by performing colectomies on pigs.

14.   Before the game, the umpiring crew was unaware that the system was being tested.

15.   Bergonzoli, the president of Dartfish USA, said that the system was tested at the Olympic bobsled run, but that NBC had not used it.

16.   Because the Texas City emergency siren system is normally tested at noon on Wednesdays, at least one person near the Sterling plant disregarded the warning.

17.   A New York hospital is testing the system now.

18.   A physician who has tested the system said it might already have saved at least one life.

19.   A physician who has tested the system said recently that it might have already saved at least one life.

20.   About a dozen customers are testing the system, which is expected to be launched late this spring.