51.   The Internet is becoming an effective fund-raising tool, because it allows contributors to give by using credit cards.

52.   The number of false positives and false negatives is still too high for the test to be an effective diagnostic tool.

53.   The Perception Analyzer has proved to be an effective tool in measuring student responses, said Devorah A. Lieberman, director of teaching and learning excellence at the university.

54.   The phone may be the most effective tool, but many contributors want to meet the candidate in person at a reception or dinner.

55.   The spray-painted message may be the most effective tool yet in the fight against AIDS, which government officials here say has reached dire proportions.

56.   The various blacklists that have cropped up on the Net are no doubt an effective tool in keeping spammers at bay.

57.   They are effective tools for any group, including many groups I despise.

58.   This can be an effective disciplinary tool, because your child really wants to be with you, Wallace says.

59.   This seriously undercuts the treaty as an effective international tool for curtailing the spread of nuclear weapons.

60.   They were the most effective tools used by older urban centers to reconfigure themselves in the era of mass suburban exodus.