21.   CBS remains the network with the smallest presence in the cable television business, but this deal could signal a change in strategy, CBS executives said.

22.   Computer technologists are working on chips embedded in eyeglasses to expand peripheral vision and in clothing to signal changes in balance, preventing falls.

23.   Costa said the decision, while expected, signals a change in the regulatory body.

24.   Does it signal a change in policy?

25.   Economists note that decisions on whether to add or drain reserves from the banking system can signal a change in the Federal funds target.

26.   Greenspan has used appearances before Congress to signal future changes in monetary policy direction.

27.   He lays a finger alongside it, signaling a change in tone.

28.   He thinks a top American finisher could signal a change in the perception of the sport.

29.   Here in Manhattan, where the Detroit native lives, Flanagan arrives for his periodic engagements as if signaling the change in the seasons.

30.   I realized that the explosion signaled irreversible changes in the world.