What's the difference between Legacy and UEFI boot?

Related questions

1. Do I have UEFI or BIOS?
2. What is UEFI firmware settings in Windows 10?
3. Is my Windows UEFI or legacy?
4. Which boot is better UEFI or legacy?
5. What is BIOS UEFI?
6. Is MBR slower than GPT?
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Tags

1. #extensible
2. #difference
3. #firmware
4. #interface
5. #scheme
6. #master
7. #unified
8. #below
9. #successor
10. #partitioning
11. #table
12. #record
13. #legacy
14. #partition
15. #primary
16. #between
17. #whereas