61.   But there increasingly are signals that the technology has made a breakthrough from being an experiment to being a promising commercial product.

62.   But there were warning signals that Penn Ship might run into trouble, he said.

63.   But there are conflicting signals.

64.   But while allegiance among Hispanics is strong now, there are signals that may prove worrisome for the future.

65.   CBS must also worry about the strength of the signals for its new UHF stations, though Schweitzer said both signals were strong.

66.   Carlson said all the early signals were right for the industry in Massachusetts to have a banner year.

67.   Cell phone signals are purposely weak, so that a channel carrying a call in one cell can also be used in a nearby cell without creating interference.

68.   Davidson said the signals were evident.

69.   Digital signals are capable of carrying a high-definition picture.

70.   Digital signals are composed of a binary code, and carry more information than the analog, or wave, signals that television is carried on today.