Why 1 KB is 1024 and not 1000?

Related questions

1. Is 200 kB's fast?
2. What is a KB?
3. Which is better Kbps or Mbps?
4. What's after a terabyte?
5. What is the meaning of kB s?
6. Is a KB 1000 or 1024?
7. Is 1000 kbps fast?
8. Is a Gigabyte 1000 or 1024?
9. Is a terabyte 1000 or 1024?
10. How do you convert from KB to hexadecimal?

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2. #kilobyte
3. #based
4. #computers
5. #system
6. #determining
7. #there
8. #bytes
9. #binary
10. #approximation
11. #takes
12. #space
13. #after
14. #reason
15. #cases
16. #because
17. #means