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Issue No. 07 - July (1990 vol. 23)
ISSN: 0018-9162
pp: 15-17
<p>Two mishaps early this year forcefully reminded the authors how important computer systems' reliability has become to human well-being in this last decade of the 20th century. In January, large parts of ATT's long-distance telephone switching networks failed because of a software problem. Then, in February, a 'fly by wire' Airbus A320 aircraft crashed in Bangalore, India. While a definitive cause for the accident has yet to be established (preliminary investigations suggest that the control computers might well have performed to specifications), the fact that the A320 employs a fully electronic cockpit with no mechanical backup for control has raised much speculation about the computers' role in the crash. The authors stress that the basic idea behind building in a fault tolerant capability is to provide the system with extra (redundant) resources.</p>

S. Murugesan and A. D. Singh, "Fault-Tolerant Systems," in Computer, vol. 23, no. , pp. 15-17, 1990.
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