In simple words, the process can be explained in this way.
The data which we feed into the computer is input, the work CPU do is process and the result which the computer give is output.
For any country, his defence is most important for the safety and security of its people.
Also, computer in this field helps the country’s security agencies to detect a threat which can be harmful in the future.
They use computers to diagnose diseases, run tests and for finding the cure for deadly diseases.
Also, they are able to find a cure for many diseases because of computers.
But, it was for only government use and not for public use.
Above all, in the beginning, the computer was a very large and heavy machine.
But according to some experts computer exists at the time of world war-II.
Also, at that time they were used for keeping data.