"Yotta" redirects here. For the Finnish musician, see Yotto.
For similar terms, see Yota (disambiguation).
Look up yotta- in Wiktionary, the free dictionary.
Yotta is the largest decimalunit prefix in the metric system, denoting a factor of 1024 (1000000000000000000000000), or one septillion. It has the symbol Y. The prefix name is derived from the Ancient Greekὀκτώ (oktṓ), meaning eight, because it is equal to 10008. It was added as an SI prefix to the International System of Units (SI) in 1991.[1]
One yottabyte (YB) is a unit of digital information or information storage capacity for one septillion bytes or 1000zettabytes. The yobibyte (YiB) is a related unit that uses a binary prefix and means 10248 bytes, which is approximately 1.2 septillion bytes.
^Prefixes adopted before 1960 already existed before SI. The introduction of the CGS system was in 1873.
^ Jump up to: abcdefPart of the beginning of the prefix was modified from the word it was derived from, ex: "peta" (prefix) vs "penta" (derived word).
^The fermi was introduced earlier with the same symbol "fm", in which then the "f" became a prefix. The Danish word is used since it is vaguely spelled similar to fermi.