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Unofficial Si PrefixesThere exist several unofficial SI prefixes, known as "bogus" SI prefixes. Some of these were proposals that were rejected. None are in common use, and many of the powers of ten they represent are already taken by official prefixes. In addition, the SI prefixes myrio and myria are obsolete. One such bogus prefix is bronto, used in the fake term brontobyte. References on the World Wide Web suggest meanings of the bronto prefix to be variously any of 1015, 1021, 1024, or 1027. SI has already produced standard prefixes for 1015 (peta), 1021 (zetta) and 1024 (yotta). There are many other unofficial prefixes. Some of them appear to come from a numerical Greek root indicating the power of 1000 the prefix means. These prefixes are as follows: | Prefix | Purported meaning | | una | 1033 | | vendeka (V) | 1033 | | weka (W) | 1030 | | dea | 1030 | | nea | 1027 | | xenna (X) | 1027 | | otta | 1024 | | hepa | 1021 | | ento | 10-21 | | fito | 10-24 | | syto | 10-27 | | xenno (x) | 10-27 | | tredo | 10-30 | | weko (w) | 10-30 | | revo | 10-33 | | vendeko (v) | 10-33 | External links
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