Petabyte



[pet-uh-bahyt] /ˈpɛt əˌbaɪt/

noun
1.
2 50 , or 1,024 .
2.
(loosely) 10 15 or a million billion bytes. Symbol: PB.
/ˈpɛtəˌbaɪt/
noun
1.
(computing) 1015 or 250 bytes
petabyte
(pět’ə-bīt)

unit
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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