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A terabyte (derived from the SI Prefix '' Tera -'') is a measurement term for Data Storage Capacity equal to approximately 1000 Gigabyte s. Another way to look at is one Trillion ( Short Scale ) Byte s. It is commonly abbreviated '''TB'''.

Because of irregularities in using the Binary Prefix in the definition and usage of the Kilobyte , the exact number in common practice could be either one of the following:

  • 1,000,000,000,000 bytes – 10004 or 1012.

  • 1,099,511,627,776 bytes – 10244 or 240. (This capacity may be expressed unambiguously as a Tebibyte .)


The prefix "tera" originates from the Greek word teras meaning 'monster'.


TERABYTES IN USE


  • The U.S. Library Of Congress has claimed it contains approximately 20 terabytes of text.

  • The shipping company UPS has approximately 474 terabytes of information in its databases.

  • 18 minutes of UHDV consumes 3.5 terabytes of data.

  • Personal Computer s and related devices such as TiVo s containing a terabyte or more of storage space have recently become practical using combinations of high-capacity mass-market Hard Drive s. As Of November 2005 , common commercial hard drives exceeded 500 gigabytes in size, so storage capacity totalling a terabyte or more can be reached using as few as 2 to 3 hard disks, at a street cost of as little as USD $450, down from over USD $1000 in 2003 . (''source: www.newegg.com'')



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