It was "the biggest single information systems project the world has ever seen," said one CIO. It was early 1996, and Y2K update and replacement work was starting to consume IT departments worldwide. It would cost companies an estimated $400 billion to $600 billion to ensure that their systems didn't fail because of a programming date-field shortcut. Banks were particularly vulnerable because so many of their functions are based on the time-money equation. Our cover story, "Time's Up," was a warning: If you're not already on the Y2K case, get on it -- and make sure your supply chain partners do the same. People still debate whether the mad Y2K scramble was much ado about little, since the year 2000 arrived with barely a computer glitch. Perhaps Y2K was the most expensive better-safe-than-sorry project the world had ever seen.