ted not only a computer-dependent society, but, also an interdependent planet.
             We already have had frequent experiences with how fragile these systems are, how failure's cascade through a networked system. While each of these systems relies on millions of lines of code that detail the required processing, they handle their routines in serial fashion. Any next step depends on the preceding step. This serial nature makes systems, no matter their size, vulnerable to even the slightest problem anywhere in the system. In 1990, ATT's long distance system experienced repeated failures. At that time, it took two million lines of computer code to keep the system operational. But just three lines of faulty code brought down these millions of lines of code. (6)
             And these systems are lean; redundancies are eliminated in the name of efficiency. This leanness also makes the system highly vulnerable. In May of this year, 90% of all pagers in the U.S. crashed for a day or longer because of the failure of one satellite. Late in 1997, the Internet could not
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