What is difference between AT and ATX power supply?

Related questions

1. Is there any difference between ATX and BTX power supply?
2. Is power supply compatible with motherboard?
3. How does a power supply work?
4. What is an AT power supply?
5. What is the 4 pin connector on the power supply?
6. What is ATX and BTX?
7. Does my power supply have a 6 pin connector?
8. What is ATX Austin?
9. What is ATX stand for?
10. Is micro ATX bigger than mini ITX?

Tags

1. #actually
2. #because
3. #different
4. #separate
5. #motherboard
6. #power
7. #supplies
8. #supply
9. #require
10. #connector
11. #connectors
12. #motherboards
13. #single