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A unit of information equal to one sextillion (10²¹) or, strictly, 2⁷⁰ bytes.
- ‘A zettabyte, incidentally, is roughly half a million times the entire collections of all the academic libraries in the United States.’
- ‘We are talking just under half a Zettabyte.’
- ‘This means that 1,000 exabytes equals 1 zettabyte (ZB), and 1,000 zettabytes equals 1 yottabyte (YB).’
- ‘This is 42 zettabytes, more than 32 million times larger than the projected storage of the 2007 computer cluster.’
- ‘Humanity's total digital output currently stands at 8,000,000 petabytes—which each represent a million gigabytes—but is expected to pass 1.2 zettabytes this year.’
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