Nines are an informal, yet common method of grading the purity of very fine precious metals such as platinum, gold and silver. Platinum (ˈplætɪnəm is a Chemical element with the Atomic symbol Pt and an Atomic number of 78 Gold (ˈɡoʊld is a Chemical element with the symbol Au (from its Latin name aurum) and Atomic number 79 Silver (ˈsɪlvɚ is a Chemical element with the symbol " Ag " (argentum from the Ancient Greek: ἀργήντος - argēntos gen Based on the system of millesimal fineness, a metal is said to be one nine or one nine fine if it is 900 fine, or 90% pure. Millesimal fineness is a system of denoting the purity of Platinum, Gold and Silver Alloys by parts per thousand of pure metal by mass in A metal that is 990 fine is then described as two nines fine and one that is 999 fine is described as three nines fine. Thus, nines are a logarithmic scale of purity for very fine precious metals. Definition and base Logarithmic scales are either defined for ratios of the underlying quantity or one has to agree to measure The Nines scale is also sometimes used in describing the purity of bottled gases.
Nines are used in a similar manner to describe computer system availability. Uptime is a measure of the time a Computer system has been "up" and running
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Uptime is a measure of the time a Computer system has been "up" and runningDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic