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The exabyte is a multiple of the unit byte for digital information. In the International System of Units (SI), the prefix exa indicates multiplication by the sixth power of 1000 (1018). Therefore, one exabyte is one quintillion bytes (short scale). The symbol for the exabyte is EB.
The zebibyte is a multiple of the unit byte for digital information. It is a member of the set of units with binary prefixes defined by the International Electrotechnical Commission (IEC). Its unit symbol is ZiB. The prefix zebi (symbol Zi) represents multiplication by 10247, therefore: 1 zebibyte = 270 bytes = 1180591620717411303424bytes = 1024 exbibytes.