As an expert in linguistics and semantics, I can provide you with a comprehensive answer regarding the abbreviations "K" and "M."

In English, "K" often stands for "kilo," which is a prefix in the metric system denoting a factor of a thousand. For example, 1 kilometer is equal to 1,000 meters, and 1 kilogram is equal to 1,000 grams. However, "K" can also stand for "king" in a game context, or it might represent "kelvin" in the context of temperature measurement.

"M," on the other hand, typically stands for "million" in financial or numerical contexts, indicating a million units of a particular item or currency. It can also represent "male" in a gender context, or "meter" in the metric system of measurement.

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When we write "30 K" for 30,000, we are not using Roman numerals but pseudo-metric, where K stands for "kilo-". For the same reason, "30 M" means 30,000,000, using M for "mega-" (or just "million"). It would be wrong to use Roman numerals this way; M here can't stand for thousand.read more >>