Why is 1tb only 931gb?

Related questions

1. Is 1tb a lot of storage?
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5. How many GB should a computer have?
6. Is 500gb HDD good?
7. Can I replace HDD with SSD in laptop?
8. Is 500gb or 1tb better?
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Tags

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2. #computers
3. #offer
4. #931gb
5. #stores
6. #binary
7. #decimal
8. #approximations
9. #nothing
10. #there
11. #space
12. #occupies
13. #either
14. #values
15. #document
16. #wrong
17. #drive
18. #bytes