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What does k mean?
K is used to represent 1000. Kilo is derived from the Greek word χίλιοι (khilioi or chilioi), meaning “thousand”.
k (lowercase) is a prefix used in the metric system, denoting a factor of a thousand (10³ or 1,000)
For example, kilometer (km) means thousand meters
K (uppercase) is often used as a suffix indicating “times 1000”.
For example, 25K means 25000
In some fields of computer science and information technology, K usually means “times 1024”, because of the mathematical coincidence that 210 is approximately 10³.
For example, 1 Kb means 1024 bytes.