five 9s

five 9s definition - finance
99.999. In computer terms, a system should be operating 99.999% of the time, which works out to be 5.4 minutes of downtime in a year. Companies talk about their technological systems as being able to achieve five 9s.

Webster's New World Finance and Investment Dictionary Copyright © 2003 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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