petabyte 2^50 = 1,125,899,906,842,624 bytes = 1024 {terabytes} or roughly 10^15 bytes. 1024 petabytes is one exabyte. Google is {estimated (http://www.cio.com/article/135700/Seven_Wonders_of_the_IT_World/3)} to store about 200 petabytes of data in about 25 {data centers} around the world. See prefix. (2007-09-13)
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