Most of the new curriculums will be in use by September, although Mr. Klein said elementary schools could delay introducing the new math program until 2004.

Mr MacGregor said that he would delay introducing the scheme because of the demands made on teachers by other educational reforms.

The House ethics committee called for Mr. Biaggi's expulsion from Congress last month, but delayed introducing the resolution until he can participate in the floor proceedings.

But last week, Congress reached agreement with President Clinton to delay introducing the tests for at least a year.

DAT was available as early as 1987 in Japan and Europe, but device manufacturers delayed introducing the format to the United States in the face of opposition from the recording industry.

Some analysts suggested that high temperatures led clothing retailers to delay introducing higher-priced fall goods to clear summer stocks.

Shares of the Nintendo Corporation fell 4 percent on reports that the company would delay introducing its next-generation video game player until early next year.

Otherwise, there is no known way to prevent food allergies except to delay introducing allergy-causing foods to infants until their gastrointestinal tract has had a chance to mature.

The broadcasters asked Nielsen to delay introducing the local people meters until the council accredits them.

The chairman of the committee, Bill Archer, R-Texas, says that he might delay introducing the bill before the full House until next year, rather than risk defeat.