yobi-

Etymology
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Prefix

 * 1) The IEC prefix meaning 280 = 1,0248 = 1,208,925,819,614,629,174,706,176. Compare yotta-, meaning 1024 = 1,0008 = 1,000,000,000,000,000,000,000,000, a septillion.

Usage notes
Not yet in widespread use, this binary multiple prefix was established to make various units used in computing precise. See for discussion.