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.
"five 9s." YourDictionary, n.d. Web. 13 October 2018. <http://www.yourdictionary.com/five-9s>.
five 9s. (n.d.). Retrieved October 13th, 2018, from http://www.yourdictionary.com/five-9s
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