reliability of computer systems

Reliability is crucial and unreliable systems can cause disaster.
Name one example of a computer system in the airline, medical or banking industries
and explain why it needs to be reliable. 

The reliability of computers is important because if a bank decided to install a new computer system without checking it multiple times it is likely it could crash or freeze this could cause a lot of problems e.g  people wouldn't be able to access their bank accounts to make a payment or withdraw money from cash machines it could get the company in trouble or if the airline installed a new computer system and it froze while the plane was flying with passengers on the plane the airplane would crash and everyone on the plane will die.

Give examples of two different measures that can be taken to improve the reliability of
computer systems. 

One way company's could prevent this is by having regular check ups to see if there are any problems another way to prevent this is by warning people what they are doing so people know there might be technical difficulties and they should expect it.