yottabyte (unit, data) (YB) A unit of data equal to 10^24 bytes but see binary prefix for other definitions. A yottabyte is 1000^8 bytes or 1000 zettabytes.
It is estimated that the web contains about one yottabyte of data (2013). 1000 yottabytes has been called one brontobyte. See prefix. Last updated: 2013-11-04
