Our world was shaken recently when the New York World Trade Center was hit by terrorists. We're learning lessons on many levels as a result of that tragedy. For the first time in more than a decade, we Americans were reminded that we are vulnerable. We are also re-learning the benefit of having a computer system disaster plan. Many companies in those buildings were literally put out of business because of the bombing. Some, however, found that their business never skipped a beat— because they had planned ahead.