At the dawn of the new millenium, as the clocks and calendars turn over to the year 2000, many of the world's computer systems and other devices controlled by silicon chips may stop working because they are programmed to interpret 00 (zero zero) as the year 1900. And that erroneous date could cause them to freeze up, shut down, or create major errors in calculations. Known as the year 2000 problem, or in industry shorthand as Y2K, this seemingly trivial computer glitch is costing businesses billions of dollars to fix. NPR's John McChesney reports.

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