Yottabyte

Because of irregularities in definition and usage of the kilobyte, the exact number could be any one of the following:

1. 1,208,925,819,614,629,174,706,176 bytes - 1024 times 1024 times 1024 times 1024 times 1024 times 1024 times 1024 times 1024, or 2⁸⁰. This is 1024 times a zettabyte. This is the definition used in computer science and computer programming
2. 1,000,000,000,000,000,000,000,000 bytes - or 10 ²⁴.

A yottabyte (2⁸⁰ bytes) is about 2.01 moles of bytes.

There isn't (yet) a common name for 1024 times a yottabyte.

To clarify the meaning(1) above, the International Electrotechnical Commission (IEC), a standards body, in 1997 proposed short unions of the International System of Units (SI) prefixes with the word "binary." They did not provide a name for this number, although, it would probably be yobibyte. This naming convention has not been widely accepted.

External Links

http://www.quinion.com/words/turnsofphrase/tp-kib1.htm

http://www.nist.gov/public_affairs/techbeat/tb9903.htm