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Meanings of metric prefix in English

Russian
приставки си
Portuguese
prefixo do si
Spanish
prefijos del si
Catalan
prefixos del si

Symbol indicating a multiple of a physical unit.

приставки си
Usage of metric prefix in English
1
Note that the formal SI metric prefix for 1000 is 'k'; some use this strictly, reserving 'K' for multiplication by 1024 (KB is thus 'kilobytes').
The Jargon File, Version 4.2.2, 20 Aug 2000
2
In techspeak and jargon, the standard metric prefixes used in the SI (Système International) conventions for scientific measurement have dual uses.
The Jargon File, Version 4.2.2, 20 Aug 2000