Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizen MissBook for the clue delivery! CTOnews.com, Nov. 20, according to the Associated Press, at the 27th International Metrology Conference, which ended on Friday, participants agreed to introduce ronna, quetta, ronto and quecto as the "prefix" of the international system of units.

There are 27 zeros for ronna and 30 zeros for quetta. Ronto is the reciprocal of ronna, that is, 0.0000000000000000000000000000000000000000001, while quecto is the reciprocal of quetta.

Oliver Jones, a professor of environmental chemistry at the ▲ International Metrology Conference, said: "at first glance, this does not seem like a particularly exciting change, but the same standard prefix around the world can help us express the right meaning and make others understand us."

The National Physics Laboratory said in a statement that the newly added prefix was "driven by the growing demand for data science and digital storage, which has been used in the biggest prefix at present".

CTOnews.com learned that before, the largest prefix in the international unit was "Yao yotta," which stands for 24 zeros, and the smallest prefix, "uni yocto," is the reciprocal of yotta. IDC, a market intelligence firm, predicts that by 2025, all the data in the world will total about 175ZB (zettabyte, the 70th power of 2), or about 0.175YB (Yaobyte, the 80th power of 2).

Richard Brown, head of metrology or measurement at NPL, introduced four new prefixes, which were approved by representatives of 64 countries and territories. Brown added that ronna, ronto, quetta and quecto were chosen because the existing prefixes do not yet use the letters R and Q. The symbols for ronna and quetta are R and Q respectively, while the symbols for ronto and quecto are r and Q, respectively.

According to the new prefix, the mass of the earth is about 6 ronna grams, or 6Rg, and the mass of electrons is about 1 ronto grams, or 1rg.

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