Zettabyte

n. unit of data size equal to 2 to the 70th power bytes or 1024 exabytes (Computers)

A zettabyte (derived from the SI prefix zetta-) is a unit of information or computer storage equal to one sextillion (one long scale trilliard) bytes. It is commonly abbreviated ZB. As of 2007, no computer has one zettabyte of storage. When used with byte multiples, the SI prefix may indicate a power of either 1000 or 1024, so the exact number may be either:1,000,000,000,000,000,000,000 bytes — 10007, or 1021.1,180,591,620,717,411,303,424 bytes — 10247, or 270.
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<unit> 2^70 = 1,180,591,620,717,411,303,424 bytes = 1024 exabytes.
See prefix.
(1997-05-02)