What does system availability mean?

Related questions

1. What is a reliability system?
2. What is an example of reliability?
3. What do sysadmins do?
4. Are four Golden signals?
5. What is white box monitoring?
6. What is a vanilla box?
7. Is a black box a good idea?
8. What is white box testing example?
9. How reliability is calculated?
10. What is the difference between black box and white box testing?

Tags

1. #required
2. #during
3. #minutes
4. #correctly
5. #system
6. #mission
7. #period
8. #availability
9. #probability
10. #means
11. #operating