Why are NAND gates preferred?

Related questions

1. How many NAND gates are required for and gate?
2. How NAND gate is a universal gate?
3. Which gate is known as universal gate?
4. What is the output of NAND gate?
5. Are NAND gates associative?
6. What is a Boolean gate?
7. What is the Boolean expression for a NAND gate?
8. Can a NAND gate have three inputs?
9. How a NAND gate can be used as an inverter?
10. How many NAND gates are used to form or gate?

Tags

1. #mobility
2. #transistor
3. #because
4. #faster
5. #compared
6. #three
7. #leakage
8. #additionally
9. #electrons
10. #better
11. #holes
12. #times
13. #level
14. #design
15. #structures
16. #lower
17. #normally