We have computers for a number of reasons, but these two reasons are the most important ones to me:
Computers are fast at what they do
A computer tends to be much faster than a human when it comes to doing tasks that involve working with a lot of information. If you need to do math beyond simple y=x2 equations, or if you surveyed 500 people and need to count the number of people who answered "yes" to a question, computers are usually going to solve the problem much faster than a human.
Computers tend to have better memory
Computers remember specific facts and figures with high accuracy, for as long as the hard drive holds up. This is particularly good when you need to remember large amounts of highly detailed information, like numbers.
Computers don't get tired
You may have left a computer on for days before, and you might have also noticed that the computer is not tired and doesn't slow down just because it has been on a while. In certain safety applications, computers do a great job by watching a process 24/7 in order to help humans be aware of any potential danger.
Why are computers useful to you?
Leave a comment about why you think computers are useful. Let's see how many uses we can come up with!